Measurement:Canonical Units - Revision history

Samuel at 00:38, 25 September 2026

2026-09-25T00:38:27Z

← Older revision		Revision as of 00:38, 25 September 2026
Line 116:		Line 116:
	\|\| <code>m2/s</code>		\|\| <code>m2/s</code>
	\|\| <code>m2_per_s</code>		\|\| <code>m2_per_s</code>
	\|\| ~~Multi~~-species ~~molecular diffusion~~		\|\| Physical molecular diffusivity used by the AOWIS multi-species model; backend-relative representations such as EPANET-MSX relative diffusivity are converted at the adapter boundary
	\|-		\|-
	\| <code>longitudinal_dispersion_coefficient</code>		\| <code>longitudinal_dispersion_coefficient</code>
Line 268:		Line 268:
	\|-		\|-
	\| <code>relative_diffusivity</code>		\| <code>relative_diffusivity</code>
	\|\| Molecular diffusivity relative to ~~the~~ solver reference		\|\| Molecular diffusivity relative to a defined solver reference diffusivity
	\|\| <code>1</code>		\|\| <code>1</code>
	\|\| none		\|\| none
	\|\| EPANET relative diffusivity		\|\| EPANET and EPANET-MSX relative diffusivity representations
	\|-		\|-
	\| <code>peclet_number</code>		\| <code>peclet_number</code>

Samuel at 00:29, 25 September 2026

2026-09-25T00:29:09Z

← Older revision		Revision as of 00:29, 25 September 2026
Line 488:		Line 488:
	\| Peclet-number dispersion threshold		\| Peclet-number dispersion threshold
	\|\| <code>peclet_number</code>		\|\| <code>peclet_number</code>
	\|-
	~~\| Symbolic reaction expression~~
	\|\| Measurement values remain canonical in the AOWIS domain model. Where numerical interpretation of the expression depends on a concentration, surface-area, time, or other unit convention, that convention is retained as explicit expression-unit-context metadata and applied only at the expression-evaluation boundary.
	\|-		\|-
	\| Emitter coefficient		\| Emitter coefficient

Samuel at 00:01, 25 September 2026

2026-09-25T00:01:14Z

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Samuel at 23:58, 24 September 2026

2026-09-24T23:58:02Z

@@ Line 90: / Line 90: @@
 {| class="wikitable"
-! Measurement Quantity Identifier !! Definition !! Canonical Unit !! UCUM Identifier !! AOWIS Identifier Suffix !! AOWIS Model / EPANET Mapping
+! Measurement Quantity Identifier
 |-
-| <code>volumetric_flow_rate</code> || Volume transported per unit time || cubic metre per hour (m³/h) || <code>m3/h</code> || <code>m3_per_h</code> || Demand, link flow, leakage flow, emitter flow, and pump-curve flow
+| <code>molecular_diffusivity</code>
 |-
-| <code>velocity</code> || Rate of linear movement || metre per second (m/s) || <code>m/s</code> || <code>m_per_s</code> || Link flow velocity
+| <code>longitudinal_dispersion_coefficient</code>
 |}
@@ Line 122: / Line 151: @@
 {| class="wikitable"
-! Measurement Quantity Identifier !! Definition !! Canonical Unit !! UCUM Identifier !! AOWIS Identifier Suffix !! AOWIS Model / EPANET Mapping
+! Measurement Quantity Identifier
 |-
-| <code>elapsed_time</code> || Time elapsed from a defined simulation or process origin || second (s) || <code>s</code> || <code>s</code> || Simulation elapsed time and time-based control triggers
+| <code>elapsed_time</code>
 |-
-| <code>duration</code> || Length of a time interval || second (s) || <code>s</code> || <code>s</code> || Simulation duration and time steps
+| <code>duration</code>
 |-
-| <code>time_of_day</code> || Time elapsed since the start of the current day || second (s) || <code>s</code> || <code>s</code> || Simulation start time and clock-time controls
+| <code>time_of_day</code>
 |}
 == Hydraulic Coefficients and Other Dimensionless Quantities ==

Samuel at 11:12, 19 August 2026

2026-08-19T11:12:37Z

@@ Line 35: / Line 35: @@
 The AOWIS identifier suffix is not itself a UCUM unit identifier.
-Generic or dynamically typed measurement values MUST identify their resolved measurement quantity and use the canonical unit defined by this registry.
+For generic or dynamically typed measurement values, the resolved measurement quantity determines the canonical unit through this registry.
 == Length and Distance Quantities ==
@@ Line 243: / Line 243: @@
 |-
 | <code>capacitance</code> || Ability to store electric charge || farad (F) || <code>F</code> || <code>f</code> || Electrical model
 |}

Samuel at 17:19, 18 August 2026

2026-08-18T17:19:14Z

@@ Line 244: / Line 244: @@
 | <code>capacitance</code> || Ability to store electric charge || farad (F) || <code>F</code> || <code>f</code> || Electrical model
 |}
 == References ==
 <references />

Samuel: Samuel moved page Measurement:Unit Identifiers to Measurement:Canonical Units without leaving a redirect

2026-08-18T15:22:48Z

Samuel moved page Measurement:Unit Identifiers to Measurement:Canonical Units without leaving a redirect

← Older revision		Revision as of 15:22, 18 August 2026
(No difference)

Samuel at 15:20, 18 August 2026

2026-08-18T15:20:42Z

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Samuel at 15:05, 18 August 2026

2026-08-18T15:05:49Z

@@ Line 47: / Line 47: @@
 REQ-MEAS-UNI-010: Currencies MUST NOT be represented as UCUM units in AOWIS. Monetary values MUST identify or reference a currency using its ISO 4217 currency identifier.
 </pre>
 == Canonical Measurement Quantities and Units ==

Samuel at 10:13, 18 August 2026

2026-08-18T10:13:57Z

Show changes