View source for CSN Assumption Names

= &nbsp; '''[[CSDMS_Standard_Names | CSDMS Standard Names]]  &mdash; Assumption Names ''' =
:
* This document provides standardized assumption names or '''descriptors''' for use in Model Coupling Metadata (MCM) files.  They are organized into groups which are (for the most part) mutually exclusive and which intend to span the types that are needed to describe a model's underlying physics.  They cannot yet be said to be exhaustive but they are illustrative.  The ones collected here already illustrate various language patterns that are commonly used to describe assumptions. <br/> <br/>

* Note that '''assumption''' is meant to be taken as a broad term that can include things like ''conditions'', ''simplifications'', ''approximations'', ''limitations'', ''conventions'', ''provisos'' and other forms of clarification.  <br/> <br/>

* CSDMS encourages model developers to include as many <assume> tags in their Model Coupling Metadata (MCM) file as they feel apply to their model or to a particular input or output variable name.  XML tag nesting determines the scope of an <assume> tag. For someone familiar with a particular modeling domain, the terms that have been collected here should be easily recognized and understood as part of that domain's standard terminology. <br/> <br/>

* Given a collection of models that have Model Coupling Metadata (MCM) files which include a standardized listing of assumptions it will be straightforward to write software that allows the CSDMS modeling framework to automatically check whether two components to be coupled are compatible and alert users to potential problems or mismatches.  Reports can also be generated automatically that quantify the ''degree of compatibility''.  Similarly, opportunities for valid model coupling can then also be automatically identified.

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== {{ Bar Heading| text=Boundary Condition Assumptions}} ==
:
* See: [http://en.wikipedia.org/wiki/Boundary_value_problem Boundary value problem] and [http://en.wikipedia.org/wiki/Initial_value_problem Initial value problem].  Initial conditions are also included in this section.
* These all end with "_boundary_condition".

 [http://en.wikipedia.org/wiki/Cauchy_boundary_condition cauchy_boundary_condition]
 clamped_boundary_condition
 constant_pressure_boundary_condition
 [http://en.wikipedia.org/wiki/Dirichlet_boundary_condition dirichlet_boundary_condition]
 free_surface_boundary_condition
 hinged_boundary_condition
 moving_boundary_condition
 [http://en.wikipedia.org/wiki/Mixed_boundary_condition mixed_boundary_condition]
 [http://en.wikipedia.org/wiki/Neumann_boundary_condition neumann_boundary_condition]
 natural_boundary_condition
 no_normal_flow_boundary_condition
 no_slip_boundary_condition
 periodic_boundary_condition   (same as "wrap-around")
 pinned_boundary_condition
 [http://en.wikipedia.org/wiki/Robin_boundary_condition robin_boundary_condition]
 stefan_boundary_condition  (See: [http://en.wikipedia.org/wiki/Stefan_problem Stefan problem].)
 tidal_boundary_condition
 toroidal_boundary_condition   (same as "doubly periodic" ??)

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== {{ Bar Heading| text=Conserved Quantity Assumptions}} ==
:
* These names all end in "_conserved".  See [http://en.wikipedia.org/wiki/Conservation_law Conservation Law] and links therein.
* These names would usually be used within an <object> tag block which would make it clear what is being conserved (e.g. water or sediment).

 angular_momentum_conserved
 electric_charge_conserved
 energy_conserved
 linear_momentum_conserved
 mass_conserved
 momentum_conserved
 potential_vorticity_conserved

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== {{ Bar Heading| text=Coordinate Systems}} ==
:
* These end in "coordinate_system".
* See: [http://en.wikipedia.org/wiki/List_of_common_coordinate_transformations List of common coordinate transformations].
:
 bipolar_coordinate_system
 boundary-fitted_orthogonal_curvilinear_coordinate_system
 cartesian_coordinate_system    (same as "rectilinear")
 cylindrical_coordinate_system   (same as "polar" if 2D)
 elliptic_coordinate_system
 geographic_coordinate_system
 log-polar_coordinate_system
 orthogonal_curvilinear_coordinate_system
 parabolic_coordinate_system
 projected_coordinate_system   (i.e. map projections)
 right_hand_rule_coordinate_system
 spherical_coordinate_system
 terrain_following_vertical_coordinate_system    (Same as "sigma coordinates"??  See: [http://www.ocean-modeling.org/docs.php?page=s-coordinate S-coordinate models], [http://en.wikipedia.org/wiki/Sigma_coordinate Sigma coordinates].)

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== {{ Bar Heading| text=Georeferencing Assumptions}} ==
:
* Standard names for projections, ellipsoids and datums are available in the [http://www.epsg-registry.org EPSG Registry].
:
* Standard names for projections, ellipsoids and datums are also used in the [http://trac.osgeo.org/geotiff/ GeoTIFF Spec].
:
:

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== {{ Bar Heading| text=Sign and Angle Conventions}} ==
:
 clockwise_from_east_azimuth_convention
 clockwise_from_north_azimuth_convention    (all "bearing" angles, e.g. wind "from" angles)
 clockwise_from_south_azimuth_convention
 counter-clockwise_from_east_azimuth_convention
 counter-clockwise_from_x_axis_azimuth_convention  (standard math)
 x-axis_directed_downwind
 x-axis_directed_offshore
 y-axis_directed_alongshore
 z-axis_directed_downward   (positive_downward)
 z-axis_directed_upward       (positive_upward)
 z-axis_normal_to_surface

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== {{ Bar Heading| text=Dimensionality Assumptions}} ==
:
* If the "richards_equation" assumption is used for infiltration, keep 1D and 3D out of the assumption name and give one of these with a separate <assume> tag.
* What about things like "1.5-dimensional" models?
:
 1d 
 2d
 3d

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== {{ Bar Heading| text=Equations, Laws and Principles}} ==
:
* An <assume> tag should be provided for each equation that a model (or model component) uses.  Most equations have standard names, as shown in the examples below.
:
* These all end in "_equation", "_law" or "_principle", except for the "law of the wall".
:

* See [http://en.wikipedia.org/wiki/Laws_of_science Wikipedia: Laws of Science] and [http://en.wikipedia.org/wiki/List_of_eponymous_laws List of Eponymous Laws].
:
 adams_williamson_equation    (See: [http://en.wikipedia.org/wiki/Adams–Williamson_equation Adams-Williamson equation].)
 ampere_law
 archimedes_principle
 avogadro_law
 beer_lambert_law
 bernoulli_principle
 biharmonic_equation
 biot_savart_law
 boltzman_equation
 boyle_law
 burgers_equation
 cauchy_riemann_equations
 combined_gas_law
 conservation_of_energy_law         ###
 conservation_of_mass_law            ###  (same as continuity_equation)
 conservation_of_momentum_law  ###
 coulomb_law
 dalton_law
 darcy_law   (See: [http://en.wikipedia.org/wiki/Darcy%27s_law Darcy's law]).
 darcy_weisbach_equation   (See: [http://en.wikipedia.org/wiki/Darcy–Weisbach_equation Darcy-Weisbach]).
 diffusion_equation
 ehrenfest_equations   (See: [http://en.wikipedia.org/wiki/Ehrenfest_equations  Ehrenfest equations]).
 eikonal_equation     (See: [http://en.wikipedia.org/wiki/Eikonal_equation Eikonal equation].)
 einstein_field_equations
 euler_equation   (inviscid flow)
 euler_lagrange_equation
 exner_equation
 faraday_law
 faxen_law
 fick_law
 flint_law
 fresnel_equations
 friedmann_equations
 fourier_law
 gauss_law_for_electricity
 gauss_law_for_magnetism
 gay_lussac_law
 geodesic_equation
 geometric_optics_equation
 gibbs_helmholtz_equation
 gibrat_law     (See: [http://en.wikipedia.org/wiki/Gibrat%27s_law Gibrat's law].)
 glen_stress_strain_law     (Glen's Law for glacier flows, Glen (1955); nonnewtonian fluid)
 hack_law
 ### heat_equation  (use "diffusion_equation" instead)
 helmholtz_equation
 henry_law
 horton_law
 hubble_law
 huygens_fresnel_principle     (See: [http://en.wikipedia.org/wiki/Huygens–Fresnel_principle Huygens-Fresnel principle].)
 ideal_gas_law     (See: [http://en.wikipedia.org/wiki/Ideal_Gas_Law Ideal gas law].  Also an "ideal_gas_model" ??)
 joule_first_law
 joule_second_law
 kepler_first_law_of_planetary_motion
 kepler_second_law_of_planetary_motion
 kepler_third_law_of_planetary_motion
 kirchoff_circuit_laws     [http://en.wikipedia.org/wiki/Kirchhoff%27s_circuit_laws Kirchoff circuit laws]
 kirchoff_diffraction_formula
 kirchoff_thermal_radiation_law
 laplace_equation
 law_of_the_wall          (flow resistance)
 lorentz_force_law
 manning_equation     (flow resistance)
 mass_energy_equivalence
 maxwell_equations
 minimal_surface_equation
 navier_stokes_equation
 nernst_equation  (See: [http://en.wikipedia.org/wiki/Nernst_equation Nernst equation].)
 newton_first_law_of_motion
 newton_law_of_cooling
 newton_law_of_universal_gravitation
 newton_second_law_of_motion
 newton_third_law_of_motion
 nonlinear_diffusion_equation   ###
 ohm_law
 p_laplace_equation
 planck_law
 poiseuille_law
 poisson_equation
 reynolds_averaged_navier_stokes_equation
 richards_equation   (infiltration theory)
 schroedinger_equation
 snell_law
 stefan_boltzmann_law
 stiff_equation   #### (a type, vs. a named equation)
 stokes_law
 thermodynamics_zeroth_law
 thermodynamics_first_law
 thermodynamics_second_law
 thermodynamics_third_law
 wien_displacement_law
 young_laplace_equation
 zipf_law     (See: [http://en.wikipedia.org/wiki/Zipf%27s_Law Zipf's law].)

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== {{ Bar Heading| text=Inequalities}} ==
:
* These all end in "_inequality".
:
* See [http://en.wikipedia.org/wiki/List_of_inequalities List of Inequalities (Wikipedia)].
:

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== {{ Bar Heading| text=Identities}} ==
:
* These all end in "_identity".
:
* See [http://en.wikipedia.org/wiki/List_of_mathematical_identities List of Mathematical Identities (Wikipedia)].
:


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== {{ Bar Heading| text=Approximations}} ==
:
* These all end in "_approximation" and some can be found in other sections.

 adiabatic_approximation
 binomial_approximation
 born_approximation
 born-huang_approximation
 born-oppenheimer_approximation
 boussinesq_approximation  (ocean modeling)
 central_field_approximation
 coherent_potential_approximation
 coopmans_approximation   (See: [http://en.wikipedia.org/wiki/Coopmans_approximation Coopmans approximation].)
 deep_water_wave_approximation
 diophantine_approximation (of real numbers by rationals)
 eikonal_approximation
 empty-lattice_approximation
 flat_space-time_approximation
 first-order_approximation
 fourier_series_approximation
 frictionless_approximation
 gaussian_approximation
 gross-pitaevskii_approximation
 heavy_traffic_approximation
 infiltrated-depth_approximation  (infiltration modeling)
 kirkwood_approximation
 lanczos_approximation
 laurent_series_approximation
 linear_approximation
 local-density_approximation
 low_rank_approximation
 mean-field_approximation
 minimax_approximation
 muffin-tin_approximation
 pade_approximation (of functions by rational functions)
 patched-conic_approximation
 percus-yevick_approximation
 perturbation_series_approximation   (See: [http://en.wikipedia.org/wiki/Perturbation_theory Perturbation theory].)
 power-law_approximation
 puiseux_series_approximation
 quadratic_approximation
 rigid_lid_approximation   (## maybe not here?)
 second-order_approximation
 shallow_water_approximation
 shallow_water_wave_approximation
 small-angle_approximation  (also, paraxial approximation)
 spouge_approximation
 steady-state_approximation
 stirling_approximation
 taylor_series_approximation
 thin-lense_approximation
 two-stream_approximation
 wavelet_series_approximation  ####
 wkb_approximation

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== {{ Bar Heading| text=Flow-Type Assumptions}} ==
:
* These names all end in "_flow".  

 accelerating_flow
 axisymmetric_flow  (in cylindrical coordinates, all theta derivatives are zero)
 boundary_layer_flow
 converging_flow
 couette_flow    (See: [http://en.wikipedia.org/wiki/Couette_Flow Couette flow].  Really a "flow model"?)
 critical_flow   (Froude number = 1.  See subcritical & supercritical.)
 depth_integrated_flow        (for 3D flow to 2D flow;  vs. vertically_integrated_flow)
 diverging_flow
 drag_induced_flow  (e.g. Couette flow)
 electro_osmotic_flow
 fully_developed_flow  (i.e. derivatives of velocity with distance in the flow direction vanish)
 geostrophic_flow           ###### CHECK
 hele_shaw_flow  (See: [http://en.wikipedia.org/wiki/Hele-Shaw_flow Hele-Shaw flow].  Really a "flow model"?)
 high_froude_number_flow
 high_reynolds_number_flow
 hydraulically_rough_flow
 hydraulically_smooth_flow
 hydrostatic_flow
 hypersonic_flow
 inviscid_flow  (of an ideal fluid with no viscosity)
 isentropic_flow (both adiabatic and reversible;  see isentropic_process)
 laminar_flow
 low_froude_number_flow
 low_reynolds_number_flow
 nonaccelerating_flow  (i.e. the nonlinear inertial term is negligible compared to others)
 nonhydrostatic_flow
 no_radial_flow (i.e. in cylindrical coordinates, the r component of velocity is zero)
 no_swirl_flow  (i.e. in cylindrical coordinates, the theta component of velocity is zero; also non-swirling)
 plug_flow  (See: [http://en.wikipedia.org/wiki/Plug_flow Plug flow].  Sometimes called "piston flow".)
 poiseuille_flow  (See: [http://en.wikipedia.org/wiki/Poiseuille_flow]. Really a "flow model"?)
 potential_flow   (irrotational and inviscid, as around airfoils;  See [http://en.wikipedia.org/wiki/Potential_flow Potential flow]).
 pressure_induced_flow (e.g. Poiseuille flow)
 separated_flow
 statistically_isotropic_turbulent_flow
 steady_flow  (all time derivatives equal zero)
 stokes_flow  (same as "creeping flow"; See: [http://en.wikipedia.org/wiki/Stokes_Flow Stokes flow]).
 subcritical_flow      (Froude number < 1; see: [http://en.wikipedia.org/wiki/Froude_number Froude number].)
 subsonic_flow
 supercritical_flow    (Froude_number > 1)
 supersonic_flow
 taylor_couette_flow  (Really a flow model?)
 taylor_dean_flow  (Really a flow model?)
 transonic_flow
 turbulent_flow
 unsteady_flow
 variable_area_flow  (include this one? see converging and diverging flow; nozzles)
 viscous_flow
    
 Note: "reynolds_averaged" is used in "reynolds_averaged_navier_stokes_equation".

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== {{ Bar Heading| text=Fluid-Type Assumptions}} ==
:
* These names all end in "_fluid".  See [http://en.wikipedia.org/wiki/Non-newtonian_fluid Non-newtonian Fluid] and links therein.

* See:  [http://en.wikipedia.org/wiki/Fluid_dynamics Fluid dynamics] and links therein.

* The word "material" is often used instead of "fluid" or "solid", especially in the case of material types or models that may occur in either fluid or solid form.

* Most of these assumptions correspond to a particular functional relationship that describes how a fluid or material responds to an applied shear stress.  (See: [http://en.wikipedia.org/wiki/Stress–strain_curve stress-strain curve].)  These typically involve some combination of (1) shear stress (often denoted by tau or sigma), (2) time derivative of shear stress, and (3) shear strain rate (time derivative of the strain), sometimes abbreviated to "shear rate" or "strain rate"  Note that strain is dimensionless and often denoted as epsilon. [http://en.wikipedia.org/wiki/Shear_stress Shear stress] (like pressure) has SI units of Pa.  [http://en.wikipedia.org/wiki/Shear_rate Shear rate] (same as [http://en.wikipedia.org/wiki/Strain_rate strain rate]) has SI units of (1/s). 

* Glen's Law is a power-law relationship that expresses the shear strain rate as the shear stress to a power, where the power is often n=3. It may be a special case of one of the nonnewtonian fluid types listed here.

 bingham_plastic_fluid   (See: [http://en.wikipedia.org/wiki/Bingham_plastic Bingham plastic]).
 boger_fluid (See: [http://en.wikipedia.org/wiki/Constant_Viscosity_Elastic_(Boger)_Fluids]).
 carreau_fluid  (See: [http://en.wikipedia.org/wiki/Carreau_fluid]).
 casson_fluid      (industry standard model for molten milk chocolate)
 compressible_fluid
 cross_fluid  (See: [http://en.wikipedia.org/wiki/Cross_fluid]).
 dilatant_fluid     (shear thickening fluid or STF)
 first_order_fluid
 herschel_bulkley_fluid  (See: [http://en.wikipedia.org/wiki/Herschel-Bulkley_fluid]).
 incompressible_fluid
 kelvin_voigt_fluid       (a linear viscoelastic model; same as "kelvin_material"  ?? ######)
 maxwell_fluid   (a linear viscoelastic model.  See: [http://en.wikipedia.org/wiki/Maxwell_material Maxwell material].)
 newtonian_fluid    (linear relation between shear stress and strain rate that goes through origin)
 nonnewtonian_fluid
 oldroyd_fluid   (a linear viscoeleastic model; see [http://en.wikipedia.org/wiki/Oldroyd-B_model Oldroyd-B model].
 power_law_fluid    (generalized Newtonian, Ostward-de Waele)
 pseudoplastic_fluid (shear thinning)
 quemada_fluid   (Used to model blood.  See: [http://en.wikipedia.org/wiki/Hemorheology Hemorheology].)
 rheopectic_fluid
 second_order_fluid
 super_fluid  (See: [http://en.wikipedia.org/wiki/Superfluid Superfluid]).
 thixotropic_fluid  (See: [http://en.wikipedia.org/wiki/Thixotropy Thixotropy].)
 viscoelastic_fluid  (See: [http://en.wikipedia.org/wiki/Viscoelasticity Viscoelastic].)
 viscoplastic_fluid  (See: [http://en.wikipedia.org/wiki/Viscoplastic Viscoplastic].)
  
 Note: Use "inviscid_flow" vs. "inviscid_fluid" and "viscous_flow" vs. "viscous_fluid".

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== {{ Bar Heading| text=Material-Type Assumptions}} ==
:
* These names all end in "_material".

* There is sometimes a blurred semantic distinction between a "material model" (e.g. Arruda-Boyce model) and just a "material'.  There are many named models (see separate section) for mathematical models of materials. 

* Some types of materials can exist as either a solid or a fluid, and an extra assumption tag should be used to specify if one or the other is assumed.

* "Material" is used as a generic term.  See: [http://en.wikipedia.org/wiki/Materials_science Materials science].)

 amorphous_material (e.g. gel, glass;  also noncrystalline_material.  See: [http://en.wikipedia.org/wiki/Amorphous_solid].)
 auxetic_material  (See: [http://en.wikipedia.org/wiki/Auxetics Auxetics].)
 bio_material  (See: [http://en.wikipedia.org/wiki/Biomaterial Biomaterial].)
 cauchy_elastic_material   (same as simple elastic material)
 ceramic_material    (See: [http://en.wikipedia.org/wiki/Ceramic_materials Ceramic materials].)
 composite_material   (See: [http://en.wikipedia.org/wiki/Composite_materials Composite materials].)
 compressible_material
 crystalline_material  (or solid?)
 elastic_material    (See: [http://en.wikipedia.org/wiki/Elasticity_(physics) Elasticity].)
 elastoplastic_material
 elastoviscoplastic_material  (or solid?)
 glass_material  (amorphous solid that exhibits a glass transition.  See: [http://en.wikipedia.org/wiki/Glass Glass].)
 homogeneous_material
 hyperelastic_material   (See: [http://en.wikipedia.org/wiki/Hyperelastic_material Hyperelastic material]. Also called green elastic material and special case of cauchy elastic material.)
 hypoelastic_material   (See: [http://en.wikipedia.org/wiki/Hypoelastic_material Hypoelastic material]).
 incompressible_material
 isotropic_material
 kelvin_voigt_material  (See: [http://en.wikipedia.org/wiki/Kelvin-Voigt_material Kelvin-Voigt Material].)
 linear_elastic_material
 maxwell_material  (See: [http://en.wikipedia.org/wiki/Maxwell_material].)
 mohr_coulomb_material    (See: [http://en.wikipedia.org/wiki/Mohr-Coulomb_theory Mohr-Coulomb theory].  Model or material type?)
 nonlinear_elastic_material
 plastic_material   (See: [http://en.wikipedia.org/wiki/Plastic Plastic].  Compare to polymeric material.)
 polymeric_material   (See: [http://en.wikipedia.org/wiki/Polymer Polymer].)
 semicrystalline_material
 solid_material   (for cases where material may be fluid or solid)
 thermoelastic_material
 viscoelastic_material    (See: [http://en.wikipedia.org/wiki/Viscoelasticity Viscoelastisticity].)
 viscoplastic_material   (See: [http://en.wikipedia.org/wiki/Viscoplasticity Viscoplasticity].)


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== {{ Bar Heading| text=Function-Type Assumptions}} ==
:
* These names all end in "_function". 
* See Geometry and Shape Assumptions.
 
 analytic_function
 bijective_function
 chebyshev_polynomial_function
 circle_function
 complex_valued_function
 constant_function
 continuous_function
 cosine_function
 cumulative_distribution_function
 daubechies_d2_wavelet_function    (actually a whole family, with d2, d4, ..., d20)
 decreasing_function
 differentiable_function
 differentiable_twice_function
 dirac_delta_function
 discontinuous_function
 ellipse_function
 exponential_function
 gamma_function
 gaussian_function
 golden_spiral_function
 haar_wavelet_function
 harmonic_function
 hermite_polynomial_function
 hermitian_wavelet_function
 holomorphic_function    (very similar to "analytic_function")
 hyperbola_function
 identity_function
 increasing_function
 injective_function
 inverse_function
 linear_function
 log_function
 log_spiral_function   (See: [http://en.wikipedia.org/wiki/Logarithmic_spiral Log spiral].)
 logit_function  (See: [http://en.wikipedia.org/wiki/Logit Logit function].)
 monotonic_function
 negative_function
 nondecreasing_function   (distinct from "increasing_function")
 nonnegative_function
 parabola_function   (same as "quadratic_function")
 periodic_function
 polynomial_function
 positive_function
 power_law_function
 probability_density_function
 probit_function (See: [http://en.wikipedia.org/wiki/Probit Probit function].)
 real_valued_function
 ricker_wavelet_function    ("mexican hat wavelet")
 sawtooth_wave_function
 sine_function
 sqrt_function
 square_wave_function  (See: [http://en.wikipedia.org/wiki/Square_wave square wave].)
 step_function   (See: [http://en.wikipedia.org/wiki/Heaviside_step_function Heaviside step function].)
 tanh_function
 triangle_wave_function
  
 See: [http://en.wikipedia.org/wiki/List_of_mathematical_functions List of mathematical functions (Wikipedia)].

 Note that "multivalued_function" is a misnomer. See: [http://en.wikipedia.org/wiki/Multiple-valued_function multivalued function].)

* These are already included with Probability Distributions
 beta_density_function
 gompertz_function

* We could have a similar section for '''surfaces'''.
 continuous_surface
 differentiable_surface
 differentiable_twice_surface

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== {{ Bar Heading| text=Geometric Assumptions}} ==
:
* Most of these names end in "_shaped".
* The polygons here are assumed to be regular polygons.  If they aren't, insert the adjective "irregular".
* See: [http://en.wikipedia.org/wiki/Geometry Geometry].

 circle_shaped
 cone_shaped
 cube_shaped
 cylinder_shaped
 ellipse_shaped
 ellipsoid_shaped      (e.g. for earth)
 half_plane
 hexagon_shaped
 hyperbola_shaped
 octagon_shaped
 parabola_shaped
 pentagon_shaped
 prism_shaped
 rectangle_shaped
 rhombus_shaped
 semicircle_shaped     (e.g. for a channel_cross_section)
 sphere_shaped
 square_pyramid_shaped
 square_shaped
 trapezoid_shaped      (e.g. for a channel_cross_section)
 triangular_pyramid_shaped
  
 concave
 concave_upward    (long profiles)
 convex

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== {{ Bar Heading| text=Exclusions}} ==
:
* These are objects or effects that are neglected or excluded from consideration in a model.
* Only relevant/important exclusions should be reported.
* Most of these names start with "no_".
:
 no_aerosols  (1 in CF)
 no_anthropogenic_effects
 no_antrhopogenic_land_use_change    (######  1 in CF;  excluding_anthropogenic_land_use_change)
 no_baseflow   (hydrology)    (1 in CF; excluding_baseflow)
 no_bioturbation
 no_clouds  (1 in CF)
 no distributaries
 no_friction
 no_interception  (hydrology)
 no_litter    (on forest floor)   (1 in CF;  excluding_litter)
 no_longwave-radiation
 no_macropores
 no_overbank_flow
 no_radial_flow   (explained and duplicated in "Flow type assumptions")
 no_rainfall
 no_relativistic_effects
 no_resistance
 no_shadowing
 no_shortwave-radiation
 no_slipping
 no_sloped-terrain
 no_swirl_flow   (explained and duplicated in "Flow type assumptions")
 no_snow   (1 in CF)
 no_snowfall
 no_tides   (2 in CF)
 no_turbulence
 no_vegetation
 ## no_viscosity   (use inviscid_flow)
 no_waves

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== {{ Bar Heading| text=Named Model-Type Assumptions (by Domain)}} ==
:
* These names all end in "_model".

 '''Aerodynamics Models'''
 clark_x_airfoil_model
 clark_y_airfoil_model
 clark_z_airfoil_model
 eppler_1200_airfoil_model
 joukowski_airfoil_model

 '''Agent-Based Models'''
 agent_based_model   (See: [http://en.wikipedia.org/wiki/Agent_based_model Agent-based model].)
 reynolds_flocking_model
 schelling_segregation_model   [http://web.mit.edu/rajsingh/www/lab/alife/schelling.html Schelling segregation model]

 '''Atmosphere and Radiation Models'''
 boussinesq_approximation   (not in CF, but see for_*)
 brutsaert_saturated_vapor_pressure_model
 clear_sky                  (23 in CF)
 deep_snow                  (1 in CF)
 horizontal_plane_topography        (for clear-sky radiation calculation, not in CF)
    (OR zero_slope_terrain, OR no_sloped_terrain OR nonsloped_terrain  ???
 rigid_lid               (in CF; always related to boussinesq approximation ??)
 satterlund_saturated_vapor_pressure_model
 sea_level_for_geoid     (4 in CF)
 standard_pressure      (not in CF)
 standard_temperature  (not in CF)

 '''Chemistry Models'''
 atomic_shell_model
 bohr_model
 nuclear_shell_model  (See: [http://en.wikipedia.org/wiki/Nuclear_shell_model nuclear shell model].)
 rutherford_model
 valence_bond_model
 vespr_model  (See: [http://en.wikipedia.org/wiki/VSEPR_Theory VESPR theory].)

 '''Cosmological Models'''
 baum_frampton_model  (a cyclic model)
 big_bang_model  (See: [http://en.wikipedia.org/wiki/Big_bang Big bang]).
 big_bounce_model
 big_crunch_model
 conformal_cyclic_model
 cyclic_model
 dark_energy_model   (and dark_mass_model ?)
 lambda_cdm_model   (standard model of Big Bang cosmology)
 steinhardt_turok_model  (a cyclic model)

 '''Earthquake Models'''
 rough_fault_model
 slider_block_model
 spring_block_seismic_model
 travelling_wave_model      (include the word "earthquake"?  ####)

 '''Ecological Models'''
 exponential_growth_model
 food_web_model      [http://en.wikipedia.org/wiki/Food_web Food web]
 kolmogorov_predator_prey_model
 logistic_growth_model
 lotka_volterra_model    [http://en.wikipedia.org/wiki/Predator-prey_interaction Lotka-Volterra]
 natural_selection_model    [http://en.wikipedia.org/wiki/Natural_selection Natural selection]
 population_growth_model
 richards_growth_model
 trophic_cascade_model   [http://en.wikipedia.org/wiki/Trophic_cascade Trophic cascade]

 '''Fluid Dynamics Models'''
 albertson_2d_turbulent_jet_model
 batchelor_vortex_model
 burgers_vortex_model
 couette_flow_model
 free_surface_vortex_model
 free_vortex_model  (irrotational, velocity proportional to 1/r)
 goertler_2d_turbulent_jet_model
 hill_spherical_vortex_model
 horseshoe_vortex_model
 lamb_chaplygin_dipole_vortex_model
 lamb_oseen_vortex_model
 peckham_2d_turbulent_jet_model
 poiseuille_flow_model
 rankine_vortex_model
 rigid_body_vortex_model  (velocity proportional to r)
 taylor_couette_flow_model
 taylor_dean_flow_model
 taylor_green_vortex_model
 tollmien_2d_turbulent_jet_model
 trailing_vortex_model  (or wing_tip_vortex_model)
 turbulent_jet_model
 vortex_ring_model

 '''General Physics Models'''
 double_pendulum_model   (See: [http://en.wikipedia.org/wiki/Double_pendulum Double pendulum].)
 foucault_pendulum_model  (See: [http://en.wikipedia.org/wiki/Foucalt_Pendulum Foucault Pendulum].)
 harmonic_oscillator_model
 quantum_harmonic_oscillator_model
 simple_pendulum_model    (harmonic oscillator ?  gravity pendulum?)
 standard_particle_physics_model
 vibrating_string_model

 '''Geodynamics Models'''
:
: 

 '''Hydrology:  Channelized Flow Models'''
 d8_surface_flow_model
 diffusive_wave_model    ####
 d_infinity_surface_flow_model    ####
 dynamic_wave_model 
 hydraulic_geometry_at_a_station_model
 hydraulic_geometry_downstream_model   ####  (Leopold et al.)
 kinematic_wave_model
 law_of_the_wall_flow_resistance_model  ##### ???
 manning_flow_resistance_model   ##### ???
 mass_flux_flow_model
 muskingum_flow_routing_model      (routing flow through a channel network)
 rational_regime_model

 '''Hydrology:  Evaporation (and sometimes Transpiration) Process Models'''
   (See: [http://library.wrds.uwyo.edu/wrp/87-06/ch-04.html Methods for estimating ET].)
 asce_standardized_evaporation_model    (in CUAHSI HIS HydroModeler)
 blaney_criddle_evaporation_model
 debruin_evaporation_model      (lakes and ponds)
 energy_balance_evaporation_model
 hargreaves_evaporation_model                (remove the "s" in hargreaves ??)
 jensen_haise_evaporation_model
 kohler_nordenson_fox_evaporation_model     (lakes and reservoirs)
 kohler_parmele_evaporation_model
 penman_evaporation_model
 penman_monteith_evaporation_model
 priestley_taylor_evaporation_model
 shuttleworth_evaporation_model     (a modified penman model)
 stewart_rouse_evaporation_model   (lakes and ponds)
 thornthwaite_water_balance_model    ########

 '''Hydrology:  Ground Water and Infiltration Modeling Assumptions'''
 (also see dupuit_forschheimer in Modeling Methods.)
 brooks_corey_soil_model ? ####
 confined_aquifer ####
 dupuit_assumption
 homogeneous_medium  (separate from isotropic ??)
 horizontal_flowlines  (and vertical equipotential lines)
 hydraulic_gradient_equals_free_surface_gradient
 hydraulic_gradient_equals_land_surface_gradient
 hydraulic_gradient_invariant_with_depth
 hydrostatic_pressure_head
 impermeable_horizontal_base  (or impermeable_boundary_at_base)
 impermeable_lower_boundary   (or impermeable_base)
 isotropic_medium
 steady_state_recharge ???
 transitional_brooks_corey_soil_model ? ####
 unconfined_aquifer  ####
 van_genuchten_soil_model ? ####

 '''Hydrology:  Infiltration Process Models'''
 beven_infiltration_model          (assumes Ks decays exponentially)
 green_ampt_infiltration_model
 horton_infiltration_model
 infiltrated_depth_approximation  (not in CF)  (Used by Green-Ampt and Smith-Parlange)
      (or infiltrability_depth_approximation)
 philip_infiltration_model
 richards_1d_infiltration_model
 richards_3d_infiltration_model
 scs_curve_number_infiltration_model     (remove "curve number"?)
 smith_parlange_infiltration_model

 '''Hydrology:  Snowmelt Models'''
 degree_day_snowmelt_model
 energy_balance_snowmelt_model

 '''Hydrology:  Soil Models'''
 brooks_corey_soil_model
 darcy_soil_model  ?###### See Equations, Laws, Etc.
 transitional_brooks_corey_soil_model
 van_genuchten_soil_model

 '''Hydrology:  Surface Water Modeling Assumptions'''
 bankfull_flow  (or maximum inbank flow)
 channel_width_less_than_model_cell_width
 convergent_topography
 convergent_or_divergent_topography  ###### ?
 d8_flow_between_cells
 d_infinity_flow_between_cells
 diffusive_wave
 dynamic_wave
 hydrologically_sound   (applied to a DEM)
 impermeable_surface ???
 inbank_flow   (an accepted term;  contrast with overbank and bankfull flow)
 kinematic_wave   (hydraulic_slope_equals_channel_slope)
 law_of_the_wall (also listed with equations)
 liquid_water_equivalent   (used to clarify a quantity like precipitation_rate)
 manning_equation  (also listed with equations)
 mass_flux_method_flow_between_cells
 overbank_flow
 overland_flow
 prismatic_channels
 sheet_flow
 spatially_uniform_rainfall
 #### instantaneous_unit_hydrograph idea ???

 '''Illumination and Shading Models'''
 See: [http://en.wikipedia.org/wiki/List_of_common_shading_algorithms List of common shading algorithms].
 blinn_phong_illumination_model
 cook_torrance_illumination_model
 flat_shading_model
 gouraud_shading_model
 lambert_illumination_model           (lambert vs. lambertian)
 minnaert_illumination_model
 oren_nayer_illumination_model
 phong_illumination_model
 phong_shading_model
 ward_anisotropic_illumination_model

 '''Infiltration Models (Ventilation Models)'''
 lbl_infiltration_model
 sherman_grimsrud_infiltration_model

 '''Nonlinear Science Models'''
 aperiodic_tiling_model  (See: [http://en.wikipedia.org/wiki/Aperiodic_tiling Aperiodic tiling].)
 bond_percolation_model  (what type of lattice ??)
 cellular_automata_model
 diffusion_limited_aggregation_model
 dimer_model   (and "double_dimer_model"  ?)
 ehrenfest_urn_model
 fisher_droplet_model
 interacting_particle_system_model
 ising_model
 lattice_gas_model    (includes: lattice_gas_automata_model and lattice_boltzmann_model.  See: [http://en.wikipedia.org/wiki/Lattice_gas_automaton Lattice gas automaton].)
 logistic_map_model
 penrose_tiling_model
 potts_model     (See: [http://en.wikipedia.org/wiki/Potts_model Potts model].)
 sandpile_model   (Per Bak, self-organized criticality)
 self_similar_tree_model
 site_percolation_model   (what type of lattice ??)
 voter_model

 '''Ocean Models'''
 deep_water_wave
 edge_wave
 fully_developed_sea
 kelvin_wave  (coastal or equatorial)
 passive_scalar    (e.g. temperature and salinity, perhaps suspended sediment)
 ### per_unit_length_of_wave_crest
 rossby_wave
 shallow_water_wave
 shore_parallel_contours   (not in CF)
 stokes_wave

 '''Sediment Transport Models'''
 bagnold_sediment_transport_model   (distinguish total load and bedload ####)
 detachment_limited_sediment_transport
 einstein_sediment_transport_model
 komar_longshore_sediment_transport_model    ####
 meier_peter_mueller_sediment_transport_model
 supply_limited_sediment_transport

 '''Thermodynamics Models'''
 black_body_model   (See: [http://en.wikipedia.org/wiki/Black_body Black body].)
 carnot_heat_engine_model  (See: [http://en.wikipedia.org/wiki/Carnot_heat_engine Carnot heat engine]).
 gray_body_model
 white_body_model

 '''Turbulence and Turbulence Closure Models'''
 See: [http://en.wikipedia.org/wiki/Turbulence_modeling Turbulence modeling].
 detached_eddy_simulation_model (DES)
 direct_numerical_simulation_model  (DNS)  (Navier-Stokes solved without a turbulence model)
 eddy_viscosity_model    (due to Boussinesq, 1887)
 k_epsilon_model    (due to Jones and Launder) 
 k_omega_model    (due to Kolmogorov ??)
 kolmogorov_statistical_turbulence_model
 large_eddy_simulation_model  (LES)   ?? #####
 menter_shear_stress_transport_model
 prandtl_mixing_length_model  (due to Prandtl)
 reynolds_averaged_navier_stokes_model   (or reynolds_shear_stress_model)
 smagorinsky_model   (due to Smagorinsky, 1964;  for sub-grid scale eddy viscosity)
 spalart_allmaras_model

 '''Water Wave Models'''
 airy_wave_model      [http://en.wikipedia.org/wiki/Airy_wave_theory Airy waves]
 capillary_wave_model    (type of wave vs. model for waves?)
 cnoidal_wave_model     [http://en.wikipedia.org/wiki/Cnoidal_wave Cnoidal waves]
 kelvin_wave_model    [http://en.wikipedia.org/wiki/Kelvin_wave]
 korteweg_devries_solitary_wave_model
 russell_solitary_wave_model
 solitary_wave_model
 stokes_wave_model
 tsunami_wave_model
 
:
 '''Models Not Yet Grouped'''
 general_relativity_model
 hagen_poiseuille      (pressure drop in a pipe; laminar, viscous, incompressible)
 harmonic_function   (solution to Laplace equation)
 hydraulic_jump
 inclined_plane
 power_law              ####
 special_relativity_model
 unnamed_empirical_law         ####
 VSEPR                 (to compute molecular geometry)
 boussinesq_buoyancy_approximation
 dispersion_relation   (could be linear)
 kramers_kronig_relations

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== {{ Bar Heading| text=Thermodynamic Process Assumptions}} ==
:
* These names all end in "_process".  See: [http://en.wikipedia.org/wiki/Thermodynamic_process Wikipedia: Thermodynamic process] and links therein.

 adiabatic_process (See: [http://en.wikipedia.org/wiki/Adiabatic_process Adiabatic]).
 cyclic_process
 diabatic_process
 endoreversible_process
 endothermic_process    (better as adjective? absorbs energy)
 exothermic_process     (better as adjective? releases energy)
 irreversible_process
 isentropic_process  (also called "reversible" ?; See: [http://en.wikipedia.org/wiki/Isentropic_process Isentropic]).
 isenthalpic_process  (also called "isoenthalpic"; See: [http://en.wikipedia.org/wiki/Isenthalpic Isenthalpic]).
 isobaric_process
 isocaloric_process
 isochoric_process
 isothermal_process
 polytropic_process
 quasistatic_process  (reversible implies quasistatic, but not conversely)
 reversible_process
 thermal_equilibrium  ####  (See "black_body_model".) (See: [http://en.wikipedia.org/wiki/Thermal_equilibrium Thermal equilibrium]).

<br/>
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== {{ Bar Heading| text=Stochastic Model Assumptions}} ==
:
* Many of these end with the word "_process", which is part of the standard terminology.  Many others end with "_distribution".

* See [http://en.wikipedia.org/wiki/Stochastic_process Wikipedia: Stochastic process] and [http://en.wikipedia.org/wiki/List_of_stochastic_processes_topics List of Stochastic Process Topics].

 autoregressive
 bernoulli_process
 bessel_process
 birth_death_process
 blue_noise_process
 branching_process
 brownian_bridge_process
 brownian_motion_process
 buffon_needle_process
 cauchy_process
 chinese_restaurant_process
 colored_noise_process
 compound_poisson_process
 contact_process
 continuous_process
 continuous_time_process
 counting_process
 coverage_process
 cox_point_process
 diffusion_process
 dirichlet_process
 discrete_process
 discrete_time_process
 ergodic_process
 feller_process
 fractional_brownian_motion_process
 galton_watson_process
 gaussian_white_noise_process
 geometric_brownian_motion_process
 grey_noise_process
 homogeneous
 hunt_process
 independent_increments
 #### independent_and_identically_distributed  (use both)
 infinitely_divisible_process
 inhomogeneous_poisson_process
 ito_diffusion_process
 jump_diffusion_process
 jump_process
 levy_process
 linear_least_squares_regression
 local_time_process
 markov_process
 martingale_process
 mckean_vlasov_process
 moran_process
 moving_average
 negative (process?)
 nonlinear_least_squares_regression
 nonnegative  (process?)
 nonstationary_process
 ornstein_uhlenbeck_process
 pink_noise_process
 point_process
 poisson_event_process
 poisson_line_process
 poisson_point_process
 poisson_polygon_process
 poisson_process
 polya_tree_process
 positive  (process?)
 power_law_noise_process
 pure_jump_process
 random_multiplicative_cascade_process   (is there "additive", too?)
 random_tree_process
 random_walk_process  (symmetric or unsymmetric)
 red_noise_process
 renewal_process   (generalization of Poisson point process)
 risk_process
 schramm_loewner_evolution_process  (See: [http://en.wikipedia.org/wiki/Stochastic_Loewner_evolution SLE process]).
 second_order_stationary_process
 self_avoiding_random_walk_process
 semi_markov_process
 shot_noise_process  (e.g. raindrops on a roof)
 stable_process
 stationary_process
 storage_process
 telegraph_process
 uncorrelated
 violet_noise_process
 weak_stationarity_of_order_k
 white_noise_process
 wiener_process

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== {{ Bar Heading| text=Probability Distributions}} ==
:
* Many of these end with the word "_distribution",
* Also see:  [http://en.wikipedia.org/wiki/List_of_probability_distributions List of probability distributions] (Wikipedia).
* Most of these are '''named''' distributions, but some are a '''type''' of distribution (e.g. discrete distribution).
:
 arcsine_distribution  (See: [http://en.wikipedia.org/wiki/Arcsine_distribution Arcsine distribution].)
 bates_distribution  (See: [http://en.wikipedia.org/wiki/Bates_distribution Bates distribution].)
 benford_distribution  (See: [http://en.wikipedia.org/wiki/Benford%27s_law Benford's law].)
 bernoulli_distribution   (See: [http://en.wikipedia.org/wiki/Bernoulli_distribution Bernoulli distribution].)
 beta_distribution   (See: [http://en.wikipedia.org/wiki/Beta_distribution Beta distribution].)
 beta-binomial_distribution   (See: [http://en.wikipedia.org/wiki/Beta-binomial_distribution Beta-binomial distribution].)
 beta-prime_distribution  (See: [https://en.wikipedia.org/wiki/Beta_prime_distribution Beta prime distribution].)
 bimodal_distribution  (See:  [http://en.wikipedia.org/wiki/Multimodal_distribution Multimodal distribution].)
 binomial_distribution  (See: [http://en.wikipedia.org/wiki/Binomial_distribution Binomial distribution].)
 boltzmann_distribution  (See: [http://en.wikipedia.org/wiki/Boltzmann_distribution Boltzmann distribution].)
 borel_distribution  (See: [http://en.wikipedia.org/wiki/Borel_distribution Borel distribution].)
 borel-tanner_distribution
 burr_distribution (See: [https://en.wikipedia.org/wiki/Burr_distribution Burr distribution].)
 cauchy_distribution  (See: [http://en.wikipedia.org/wiki/Cauchy_distribution Cauchy distribution].)
 champernowne_distribution  (See: [http://en.wikipedia.org/wiki/Champernowne_distribution Champernowne distribution].)
 chi-squared_distribution
 continuous_distribution
 continuous_uniform_distribution   (See: [http://en.wikipedia.org/wiki/Uniform_distribution_(continuous) Uniform distribution (continuous)].)
 dagum_distribution  (See: [https://en.wikipedia.org/wiki/Dagum_distribution Dagum distribution].)
 dirichlet_distribution (See: [https://en.wikipedia.org/wiki/Dirichlet_distribution Dirichlet distribution].)
 dirichlet-multinomial_distribution   (See: [http://en.wikipedia.org/wiki/Dirichlet-multinomial_distribution Dirichlet-multinomial distribution].)
 discrete_distribution
 discrete_uniform_distribution  (See: [http://en.wikipedia.org/wiki/Uniform_distribution_(discrete) Uniform distribution (discrete)].)
 elliptical_distribution   (See: [http://en.wikipedia.org/wiki/Elliptical_distribution Elliptical distribution].)
 erlang_distribution  (See: [https://en.wikipedia.org/wiki/Erlang_distribution Erlang distribution].)
 exponential_distribution  (See: [http://en.wikipedia.org/wiki/Exponential_distribution Exponential distribution].)
 first-contact_distribution  (See: [http://en.wikipedia.org/wiki/Spherical_contact_distribution_function Spherical contact distribution].)
 frechet_distribution   (See: [http://en.wikipedia.org/wiki/Fréchet_distribution Frechet distribution].)
 gamma_distribution   (See: [http://en.wikipedia.org/wiki/Gamma_distribution Gamma distribution].)
 gaussian_distribution  (See: [https://en.wikipedia.org/wiki/Normal_distribution Normal distribution].)
 generalized_extreme_value_distribution   (See: [http://en.wikipedia.org/wiki/Generalized_extreme_value_distribution GEV distribution].)
 generalized_pareto_distribution
 geometric_distribution   (See: [http://en.wikipedia.org/wiki/Geometric_distribution Geometric distribution].)
 geometric-stable_distribution  (See: [http://en.wikipedia.org/wiki/Geometric_stable_distribution Geometric stable distribution].)
 gompertz_distribution   (See: [http://en.wikipedia.org/wiki/Gompertz_function Gompertz function].)
 gumbel_distribution   (See: [http://en.wikipedia.org/wiki/Gumbel_distribution Gumbel distribution].)
 half-normal_distribution  (See: [http://en.wikipedia.org/wiki/Half-normal_distribution Half-normal distribution].)
 hitting-time_distribution  (See: [http://en.wikipedia.org/wiki/Hitting_time Hitting time].)
 holtsmark_distribution  (See: [http://en.wikipedia.org/wiki/Holtsmark_distribution Holtsmark distribution].)
 hyperbolic_distribution  (See: [http://en.wikipedia.org/wiki/Hyperbolic_distribution Hyperbolic distribution].)
 hyperbolic-secant_distribution  (See: [http://en.wikipedia.org/wiki/Hyperbolic_secant_distribution Hyperbolic secant distribution].)
 hypergeometric_distribution   (See: [http://en.wikipedia.org/wiki/Hypergeometric_distribution Hypergeometric distribution].)
 identically_distributed  ####
 independently_distributed  #####
 inverse-gamma_distribution   (See: [http://en.wikipedia.org/wiki/Inverse-gamma_distribution Inverse-gamma distribution].)
 inverse-gaussian_distribution  (See: [http://en.wikipedia.org/wiki/Inverse_Gaussian_distribution Inverse Gaussian distribution].)
 irwin-hall_distribution  (See: [http://en.wikipedia.org/wiki/Irwin–Hall_distribution Irwin-Hall distribution].)
 joint-probability_distribution   (See: [http://en.wikipedia.org/wiki/Joint_probability_distribution Joint probability distribution].)
 kent_distribution   (See: [http://en.wikipedia.org/wiki/Kent_distribution Kent distribution].)
 landau_distribution  (See: [http://en.wikipedia.org/wiki/Landau_distribution Landau distribution].)
 laplace_distribution  (See: [http://en.wikipedia.org/wiki/Laplace_distribution Laplace distribution].)
 levy_distribution  (See: [http://en.wikipedia.org/wiki/Lévy_distribution Levy distribution].)
 log-cauchy_distribution  (See: [http://en.wikipedia.org/wiki/Log-Cauchy_distribution Log-Cauchy distribution].)
 log-logistic_distribution  (See: [http://en.wikipedia.org/wiki/Log-logistic_distribution Log-logistic distribution].)
 log-normal_distribution  (See: [http://en.wikipedia.org/wiki/Log-normal_distribution Log-normal distribution].)
 log-poisson_distribution
 log-symmetric_distribution
 logarithmic_distribution   (See: [http://en.wikipedia.org/wiki/Logarithmic_distribution Logarithmic distribution].)
 logistic_distribution  (See: [http://en.wikipedia.org/wiki/Logistic_distribution Logistic distribution].)
 logit-normal_distribution  (See: [http://en.wikipedia.org/wiki/Logit-normal_distribution Logit-normal distribution].)
 lomax_distribution (See: [https://en.wikipedia.org/wiki/Lomax_distribution Lomax distribution].)
 maximum_entropy_probability_distribution  (See: [http://en.wikipedia.org/wiki/Maximum_entropy_probability_distribution Max entropy pdf].)
 maxwell-boltzmann_distribution   (See: [http://en.wikipedia.org/wiki/Maxwell–Boltzmann_distribution Maxwell-Boltzmann distribution].)
 mixture_distribution  (See: [http://en.wikipedia.org/wiki/Mixture_distribution Mixture distribution].)
 multimodal_distribution  (See:  [http://en.wikipedia.org/wiki/Multimodal_distribution Multimodal distribution].)
 multinomial_distribution  (See: [http://en.wikipedia.org/wiki/Multinomial_distribution Multinomial distribution].)
 nakagami_distribution  (See: [http://en.wikipedia.org/wiki/Nakagami_distribution Nakagami distribution].)
 negative-binomial_distribution   (See: [http://en.wikipedia.org/wiki/Negative_binomial_distribution Negative binomial distribution].)
 parabolic-fractal_distribution   (See: [http://en.wikipedia.org/wiki/Parabolic_fractal_distribution Parabolic fractal distribution].)
 pareto_distribution  (See: [http://en.wikipedia.org/wiki/Pareto_distribution Pareto distribution].)
 pascal_distribution  (special case of negative binomial.)
 pearson_distribution  (See: [http://en.wikipedia.org/wiki/Pearson_distribution Pearson distribution].)
 poisson_distribution  (See: [http://en.wikipedia.org/wiki/Poisson_distribution Poisson distribution].)
 poisson-binomial_distribution  (See: [http://en.wikipedia.org/wiki/Poisson_binomial_distribution Poisson binomial distribution].)
 polya_distribution  (special case of negative binomial)
 rademacher_distribution  (See: [http://en.wikipedia.org/wiki/Rademacher_distribution Rademacher distribution].)
 rayleigh_distribution   (See: [http://en.wikipedia.org/wiki/Rayleigh_distribution Rayleigh distribution].)
 rayleigh-mixture_distribution  (See: [http://en.wikipedia.org/wiki/Rayleigh_mixture_distribution Rayleigh mixture distribution].)
 reciprocal_distribution  (See: [http://en.wikipedia.org/wiki/Reciprocal_distribution Reciprocal distribution].)
 rice_distribution   (See: [http://en.wikipedia.org/wiki/Rice_distribution Rice distribution].)
 skellam_distribution   (See: [http://en.wikipedia.org/wiki/Skellam_distribution Skellam distribution].)
 skew-normal_distribution  (See: [http://en.wikipedia.org/wiki/Skew_normal_distribution Skew normal distribution].)
 slash_distribution  (See: [http://en.wikipedia.org/wiki/Slash_distribution Slash distribution].)
 stable_distribution  (See: [http://en.wikipedia.org/wiki/Stable_distribution Stable distribution].)
 student-t_distribution   (See: [http://en.wikipedia.org/wiki/Student%27s_t-distribution Student's t-distribution].)
 symmetric_distribution  (See: [http://en.wikipedia.org/wiki/Symmetric_probability_distribution Symmetric distribution].)
 tracy-widom_distribution  (See: [http://en.wikipedia.org/wiki/Tracy–Widom_distribution Tracy-Widom distribution].)
 triangular_distribution  (See: [http://en.wikipedia.org/wiki/Triangular_distribution Triangular distribution].)
 truncated_distribution  (See: [http://en.wikipedia.org/wiki/Truncated_distribution Truncated distribution].)
 tukey-lambda_distribution   (See: [http://en.wikipedia.org/wiki/Tukey_lambda_distribution Tukey lambda distribution].)
 u-quadratic_distribution  (See: [http://en.wikipedia.org/wiki/U-quadratic_distribution U-quadratic distribution].)
 unimodal_distribution
 voigt_distribution  (See: [http://en.wikipedia.org/wiki/Voigt_profile Voigt profile].)
 von-mises_distribution  (See: [http://en.wikipedia.org/wiki/Von_Mises_distribution von Mises distribution].)
 von-mises-fisher_distribution  (See: [http://en.wikipedia.org/wiki/Von_Mises–Fisher_distribution von Mises-Fisher distribution].)
 weibull_distribution  (See: [http://en.wikipedia.org/wiki/Weibull_distribution Weibull distribution].)
 yule-simon_distribution  (See: [http://en.wikipedia.org/wiki/Yule–Simon_distribution Yule-Simon distribution].)
 zeta_distribution  (See: [http://en.wikipedia.org/wiki/Zeta_distribution Zeta distribution].)
 zipf_distribution  (See: [http://en.wikipedia.org/wiki/Zipf%27s_law Zipf's law].)

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== {{ Bar Heading| text=Statistical Operation Assumptions}} ==
:
* Perhaps this should be generalized to something like "Data Transformation Assumptions"?
* These names currently all end with "averaged".  
* For ones that start with a unit of time, one of those units is assumed.  A number can be inserted in front, when necessary, as in "two_day_averaged".

 cell_averaged
 day_averaged
 depth_averaged
 domain_averaged
 hour_averaged
 interval_averaged
 month_averaged
 population_averaged
 sample_averaged
 section_averaged
 time_averaged
 vertically_averaged
 watershed_averaged
 year_averaged

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== {{ Bar Heading| text=Mathematical Assumptions}} ==
:
 algebraic (equation)
 bijection
 bounded (set)
 closed (set, curve)
 compact (set)
 complex-valued
 conformal
 constant_coefficients  (equation or polynomial)
 continuous
 continuum  (continuum_hypothesis ?)
 contraction_mapping
 countably_infinite
 degenerate
 differentiable
 differentiable_twice
 differentiable_three_times
 differential (equation)
 discontinuous
 equal_mixed_partials
 finite
 fixed_point
 ill-posed
 infinite
 injective
 integer-valued
 invertible
 irrational
 jordan_curve
 linear
 multiple_valued_function  ### (misnomer)
 negative
 nonlinear
 nonnegative
 orthogonal
 permutation
 positive
 projection
 rational
 real-valued
 spatially_uniform
 superposition
 symmetric
 time_space_substitution
 uncountably_infinite
 uniform
 weak_solution
 well-posed

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== {{ Bar Heading| text=Numerical Grid Assumptions}} ==
:
* Most of these end with the word '''grid'''.
* The word "grid" is used to include the word "mesh".
:
 adaptive_grid
 arakawa_a_grid  (unstaggered)
 arakawa_b_grid  (staggered)
 arakawa_c_grid   (staggered)
 arakawa_d_grid  (staggered, rotated 90 degrees)
 arakawa_e_grid   (staggered, rotated 45 degrees)
 arakawa_u_component   (attached to an input var)
 arakawa_v_component   (attached to an input var)
 arakawa_w_component  (attached to an input var)
 block_structured_grid
 boundary-fitted_grid   (also called "body-fitted")
 delaunay_triangle_grid
 hexagon_grid
 orthogonal_curvilinear_grid
 rectilinear_grid
 square_grid
 staggered_grid  (###### already in arakawa system ??)
 structured_grid
 triangle_grid
 uniform_grid
 unstructured_grid
 voronoi_polygon_grid

<br/>
<!-- ============================================= -->

== {{ Bar Heading| text=Numerical Method Assumptions}} ==
:
* These are used to describe the numerical method that a model uses to solve the equations it uses to compute variables of interest.  The equations could be ODEs, PDEs, algebraic equations (e.g. root finding), etc.  We probably don't need separate assumption names like "ode" and "pde" because that is implied by the equation name. See Equations, Laws and Principles for a standardized list of equation names.
* Most of these names end with "_method", "_scheme" or "_grid". 
* See: [http://en.wikipedia.org/wiki/List_of_Runge–Kutta_methods List of Runge-Kutta methods].
* See: [http://en.wikipedia.org/wiki/List_of_numerical_analysis_topics#Numerical_methods_for_ordinary_differential_equations Numerical methods for ODEs].
* See: [http://en.wikipedia.org/wiki/List_of_numerical_analysis_topics#Numerical_methods_for_partial_differential_equations Numerical methods for PDEs].
:
 a-stable_method
 absolutely-stable_method
 adams-bashforth_method
 adaptive_mesh_refinement_method   (See: [http://en.wikipedia.org/wiki/Adaptive_mesh_refinement Adaptive mesh refinement].)
 adaptive_stepsize_method   (See: [http://en.wikipedia.org/wiki/Adaptive_stepsize Adaptive stepsize].)
 adjoint_state_method  (See: [http://en.wikipedia.org/wiki/Adjoint_state_method Adjoint state method].)
 analytic_element_method  (See: [http://en.wikipedia.org/wiki/Analytic_element_method: Analytic element method]).
 backward_difference_scheme
 backward_euler_method  (See: [http://en.wikipedia.org/wiki/Backward_Euler_method Backward Euler method].)
 boundary_element_method  (See: [http://en.wikipedia.org/wiki/Boundary_element_method Boundary element method].)
 central_difference_scheme   (See: [http://en.wikipedia.org/wiki/Central_differencing_scheme Central differencing scheme].)
 characteristics_method          (known as "method of characteristics")
 collocation_method   (See: [http://en.wikipedia.org/wiki/Collocation_method Collocation method].)
 conditionally_stable_method
 conjugate_gradient_method   (See: [http://en.wikipedia.org/wiki/Conjugate_gradient_method Conjugate gradient method].)
 consistent_method
 convergent_method
 crank-nicolson_method   (See: [http://en.wikipedia.org/wiki/Crank–Nicolson_method Crank-Nicolson method].)
 direct_numerical_solution
 discrete_element_method   (See: [http://en.wikipedia.org/wiki/Discrete_element_method Discrete element method].)
 discrete_event_simulation  (See: [http://en.wikipedia.org/wiki/Discrete_event_simulation Discrete event simulation].)
 dynamic_relaxation_method  (See: [http://en.wikipedia.org/wiki/Dynamic_relaxation Dynamic relaxation].)
 euler_method   (See: [http://en.wikipedia.org/wiki/Euler_method Euler method].)  (distinguish between "forward" and "backward" with a prefix?)
 explicit_method  (See: [http://en.wikipedia.org/wiki/Explicit_and_implicit_methods Explicit and implicit methods].)
 fast_marching_method    (See: [http://en.wikipedia.org/wiki/Fast_marching_method Fast marching method], a type of level_set_method.)
 finite_difference_method   (See: [http://en.wikipedia.org/wiki/Finite_difference_method Finite difference method].)
 finite_element_method   (See: [http://en.wikipedia.org/wiki/Finite_element_method Finite element method].)
 finite_volume_method   (See: [http://en.wikipedia.org/wiki/Finite_volume_method Finite volume method].)
 first_order_accurate
 five-point_stencil_method  (See: [http://en.wikipedia.org/wiki/Five-point_stencil Five-point stencil].)
 forward_difference_scheme
 forward_time_centered_space_scheme   (FTCS scheme)
 galerkin_method   (See: [http://en.wikipedia.org/wiki/Galerkin_method Galerkin method].)
 gauss-legendre_method  (See: [http://en.wikipedia.org/wiki/Gauss–Legendre_method Gauss-Legendre method].)
 gauss-seidel_method   (See: [http://en.wikipedia.org/wiki/Gauss–Seidel_method Gauss-Seidel method].)
 halley_method   (See: [http://en.wikipedia.org/wiki/Halley%27s_method Halley's method].)
 heun_method  (See: [http://en.wikipedia.org/wiki/Heun%27s_method Heun's method].)
 implicit_method   (See: [http://en.wikipedia.org/wiki/Explicit_and_implicit_methods Explicit and implicit methods].)
 interior_point_method  (See: [http://en.wikipedia.org/wiki/Interior_point_method Interior point method].)
 iterative_method  (See: [http://en.wikipedia.org/wiki/Iterative_method Iterative method].)
 l-stable_method   (See: [http://en.wikipedia.org/wiki/L-stability L-stability].)
 landweber_iteration_method   (See: [http://en.wikipedia.org/wiki/Landweber_iteration Landweber iteration].)
 large_eddy_simulation
 lattice_boltzmann_method   (See: [http://en.wikipedia.org/wiki/Lattice_Boltzmann_methods Lattice Boltzmann methods].)
 lax-friedrichs_method   (See: [http://en.wikipedia.org/wiki/Lax–Friedrichs_method Lax-Friedrichs method].)
 lax-wendroff_method   (See: [http://en.wikipedia.org/wiki/Lax–Wendroff_method Lax-Wendroff method].)
 leapfrog_method
 level_set_method  (See: [http://en.wikipedia.org/wiki/Level_set_method Level set method].)
 linear_multistep_method   (See: [http://en.wikipedia.org/wiki/Linear_multistep_method Linear multistep method].)
 maccormack_method  (See: [http://en.wikipedia.org/wiki/MacCormack_method MacCormack method].)
 meshfree_method   (See: [http://en.wikipedia.org/wiki/Meshfree_methods Meshfree method].)
 midpoint_method  (See: [http://en.wikipedia.org/wiki/Midpoint_method Midpoint method].)
 multigrid_method   (See: [http://en.wikipedia.org/wiki/Multigrid_method Multigrid method].)
 newton_raphson_method   (See: [http://en.wikipedia.org/wiki/Newton%27s_method Newton's method]; also see "halley_method".)
 numerov_method  (See: [http://en.wikipedia.org/wiki/Numerov%27s_method Numerov's method].)
 particle-in-cell_method   (See: [http://en.wikipedia.org/wiki/Particle-in-cell Particle in cell].)
 predictor-corrector_method  (See: [http://en.wikipedia.org/wiki/Predictor–corrector_method Predictor-corrector method].)
 rayleigh-ritz_method   (See: [http://en.wikipedia.org/wiki/Rayleigh–Ritz_method Rayleigh-Ritz method].)
 relatively_stable_method
 relaxation_method   (See: [http://en.wikipedia.org/wiki/Relaxation_(iterative_method) Relaxation (iterative method)].)
 runge_kutta_method   (See: [http://en.wikipedia.org/wiki/Runge–Kutta_methods Runge-Kutta methods].  There are several distinct types.)
 second-order_accurate_method
 shooting_method   (See: [http://en.wikipedia.org/wiki/Shooting_method Shooting method].)
 spectral_method   (See: [http://en.wikipedia.org/wiki/Spectral_method Spectral method].)
 split-step_method   (See: [http://en.wikipedia.org/wiki/Split-step_method Split-step method].)
 strongly_stable_method
 successive_over_relaxation_method   (See: [http://en.wikipedia.org/wiki/Successive_over-relaxation Successive over-relaxation].)
 trapezoidal_rule_method  (See: [http://en.wikipedia.org/wiki/Trapezoidal_rule_(differential_equations) Trapezoidal rule].)
 unconditionally_stable_method
 unstable_method
 upwind_difference_scheme   (See: [http://en.wikipedia.org/wiki/Upwind_differencing_scheme_for_convection Upwind difference scheme].)
 upwind_first-order_scheme  (See: [http://en.wikipedia.org/wiki/Upwind_scheme Upwind scheme].)
 upwind_second-order_scheme  (See: [http://en.wikipedia.org/wiki/Upwind_scheme Upwind scheme].)
 upwind_third-order_scheme  (See: [http://en.wikipedia.org/wiki/Upwind_scheme Upwind scheme].)
 verlet_integration_method  (See: [http://en.wikipedia.org/wiki/Verlet_integration Verlet integration].)

<!-- ============================================= -->

== {{ Bar Heading| text=State of Matter Assumptions}} ==
:
* These can be provided when the model involves a substance (object) like water that could be in any of several possible states. See: [http://en.wikipedia.org/wiki/States_of_matter States of matter].
* Note that "liquid_equivalent" can also be inserted in quantity names such as "liquid_equivalent_precipitation_rate" to create a single quantity that can accommodate multiple states of matter.
:
 gas_phase
 liquid_phase
 plasma_phase
 solid_phase

<!-- ============================================= -->

== {{ Bar Heading| text=System State Assumptions}} ==
:
 asymptotic_equilibrium
 bistable
 dynamic_equilibrium
 equilibrium
 ergodic
 metastable   (See: [http://en.wikipedia.org/wiki/Metastability Metastability]).
 stable
 static_equilibrium
 steady_state
 unstable
 unsteady_state

<br/>
<!-- ============================================= -->

== {{ Bar Heading| text=CF Convention Standard Name Assumptions}} ==
:
*  [http://cf-pcmdi.llnl.gov/documents/cf-standard-names/ '''CF Convention Standard Names''']  often include additional information and assumptions in the name itself.  The ones in this section were found in the list of CF Standard Names and the number of occurrences found is listed in parentheses.  It is not yet clear how some of these should be captured with standard assumption names.

* Many of these are '''Location Assumptions'''.

 above_geoid                  (3 in CF)
 above_land_surface           (not in CF)
 above_reference_datum        (1 in CF)
 above_reference_ellipsoid    (5 in CF)
 above_sea_floor              (1 in CF)
 above_sea_floor_surface      (not in CF)
 above_sea_level              (1 in CF)
 above_threshold               (5 in CF)
  
 at_***                        (51 in CF)
 at_cloud_base                 (1 in CFFl
 at_cloud_top                  (3 in CF)
 at_equilibrium                (not in CF)
 at_freezing_level             (1 in CF)
 at_land_surface               (not in CF;  e.g. air pressure)
 at_maximum_upward_derivative  (1 in CF)
 at_saturation                 (4 in CF)
 at_sea_floor                  (3 in CF)
 at_sea_floor_surface          (not in CF;  e.g. water pressure)
 at_sea_ice_base               (8 in CF)
 at_sea_level                  (1 in CF)
 at_top_of_***                 (3 in CF)
 at_bottom_***                 (not in CF)
  
 assuming_***            (33 in CF)
 assuming_clear_sky        (24 in CF)
 assuming_deep_snow     (1 in CF, for surface_albedo)
 assuming_no_aerosol_or_cloud  (1 in CF)
 assuming_no_snow                    (1 in CF, for surface_albedo)
 assuming_no_tide                      (2 in CF)
 assuming_sea_level_for_geoid   (4 in CF)
 
 below_geoid         (1 in CF)
 below_sea_level     (1 in CF)
 below_sea_surface   (1 in CF)
 below_surface       (1 in CF)
 below_threshold     (3 in CF)
  
 between_air_and_sea_water     (1 in CF)
 between_sea_water_and_air     (2 in CF)
  
 due_to_***                     (399 in CF)
 due_to_all_land_processes      (2 in CF)
 due_to_convective_cloud        (1 in CF)
 due_to_diffusion               (18 in CF)
 due_to_dry_convection          (1 in CF)
 due_to_dry_deposition          (35 in CF)
 due_to_dry_troposphere         (1 in CF)
 due_to_dust_ambient_aerosol    (2 in CF)
 due_to_emission_from_grazing   (in CF)
  
 excluding_anthropogenic_land_use_change (in CF)
 excluding_baseflow (in CF)
 excluding_litter (in CF)
  
 expressed_as_***       (140 in CF)
 expressed_as_carbon    (67 in CF)
 expressed_as_chlorine  (7 in CF)
 expressed_as_nitrogen  (24 in CF)
  
 for_***                       (13 in CF)
 for_biomass_growth            (1 in CF)
 for_biomass_maintenance       (1 in CF)
 for_boussinesq_approximation  (1 in CF)
 for_momentum (2 in CF;  both "for_momentum_in_air")
  
 per_capita
 per_unit_area          (already used in CF)
 per_unit_length_of_wave_crest
 per_unit_mass          (already used in CF, and synonym for "specific")
 per_unit_time           ??
 per_unit_width         (e.g. discharge_per_unit_width)
                        (see CF: sea_water_transport_across_line,
                         and "transport_across_unit_distance")


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