Measurement:Unit Identifiers - Revision history

Samuel: /* Data Model */

2026-07-30T14:35:03Z

Data Model

← Older revision		Revision as of 14:35, 30 July 2026
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	Concrete AOWIS data structures and field definitions are specified by the [https://github.com/aowis-org/AOWIS-SERVER-MODEL AOWIS Server Model].		Concrete AOWIS data structures and field definitions are specified by the [https://github.com/aowis-org/AOWIS-SERVER-MODEL AOWIS Server Model].

			Fixed-schema fields encode their canonical unit through the normative schema and AOWIS identifier suffix; generic or dynamically typed measurement values carry an explicit canonical UCUM unit identifier.

	Measurement fields defined by the model MUST use the canonical units specified on this page.		Measurement fields defined by the model MUST use the canonical units specified on this page.

Samuel: /* Canonical Measurement Quantities and Units */

2026-07-30T14:26:31Z

Canonical Measurement Quantities and Units

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	== Canonical Measurement Quantities and Units ==		== Canonical Measurement Quantities and Units ==

	The canonical UCUM unit identifier is authoritative ~~for~~ serialization ~~and~~ data exchange.		The canonical UCUM unit identifier assigned to a measurement quantity is authoritative whenever a unit identifier is represented in serialization or data exchange.

	The AOWIS identifier suffix is an ASCII-safe representation used in field names, property names, database columns, and other technical identifiers. Division is represented by <code>_per_</code>, multiplication by <code>_</code>, and upper case is normalized to lower case.		The AOWIS identifier suffix is an ASCII-safe representation used in field names, property names, database columns, and other technical identifiers. Division is represented by <code>_per_</code>, multiplication by <code>_</code>, and upper case is normalized to lower case.

			For fixed-schema measurement fields, the measurement quantity and canonical unit MAY be defined normatively by the schema and represented through the field name and its AOWIS identifier suffix. Such fields do not require a separate unit-identifier property.

			When a unit identifier is represented explicitly, it MUST use the canonical UCUM identifier assigned to the measurement quantity. The AOWIS identifier suffix is a technical field-naming convention and is not itself a UCUM unit identifier.

			Generic or dynamically typed measurement values MUST explicitly identify their measurement quantity and canonical UCUM unit and MUST NOT rely solely on a field-name suffix.

	Each identifier suffix is explicitly defined in the following tables.		Each identifier suffix is explicitly defined in the following tables.

Samuel at 10:43, 30 July 2026

2026-07-30T10:43:25Z

← Older revision		Revision as of 10:43, 30 July 2026
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	Measurement fields defined by the model MUST use the canonical units specified on this page.		Measurement fields defined by the model MUST use the canonical units specified on this page.


	== References ==		== References ==
	<references />		<references />

Samuel: /* Data Model */

2026-07-30T10:42:31Z

Data Model

← Older revision		Revision as of 10:42, 30 July 2026
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	Measurement fields defined by the model MUST use the canonical units specified on this page.		Measurement fields defined by the model MUST use the canonical units specified on this page.


			== References ==
			<references />

Samuel: /* Data Representation Format */

2026-07-28T16:29:12Z

Data Representation Format

← Older revision		Revision as of 16:29, 28 July 2026
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	\|}		\|}

	~~== Data Representation Format ==~~
	== Data Model ==		== Data Model ==

Samuel: /* Length and Spatial Quantities */

2026-07-28T13:58:17Z

Length and Spatial Quantities

← Older revision		Revision as of 13:58, 28 July 2026
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	Each identifier suffix is explicitly defined in the following tables.		Each identifier suffix is explicitly defined in the following tables.

	=== Length and ~~Spatial~~ Quantities ===		=== Length and Distance Quantities ===

	{\| class="wikitable"		{\| class="wikitable"

Samuel at 13:57, 28 July 2026

2026-07-28T13:57:11Z

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	</pre>		</pre>

	~~```mediawiki~~
	== Canonical Measurement Quantities and Units ==		== Canonical Measurement Quantities and Units ==

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	\| EPANET map and backdrop coordinates \|\| Coordinate units determined by the associated EPANET map or backdrop configuration \|\| Convert to an explicitly identified geographic, projected, or local coordinate representation		\| EPANET map and backdrop coordinates \|\| Coordinate units determined by the associated EPANET map or backdrop configuration \|\| Convert to an explicitly identified geographic, projected, or local coordinate representation
	\|}		\|}
	~~```~~

	== Data Representation Format ==		== Data Representation Format ==

Samuel: /* Canonical Measurement Quantities and Units */

2026-07-28T13:56:32Z

Canonical Measurement Quantities and Units

Show changes

Samuel at 13:37, 28 July 2026

2026-07-28T13:37:23Z

← Older revision		Revision as of 13:37, 28 July 2026
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	* Related to: [[Measurement:Units]]		* Related to: [[Measurement:Units]]

	AOWIS uses the canonical SI-based engineering units specified in [[Measurement:Units\|Units]]. UCUM<ref name="UCUM">Unified Code for Units of Measure (UCUM) https://ucum.org</ref> is the normative syntax and code system for ~~their~~ machine-readable unit identifiers.		AOWIS uses the canonical SI-based engineering units specified in [[Measurement:Units\|Units]]. UCUM<ref name="UCUM">Unified Code for Units of Measure (UCUM) https://ucum.org</ref> is the normative syntax and code system for the machine-readable unit identifiers.

	AOWIS defines a canonical set of UCUM unit identifiers used across all system interfaces, storage formats, APIs, and inter-system data exchanges.		AOWIS defines a canonical set of UCUM unit identifiers used across all system interfaces, storage formats, APIs, and inter-system data exchanges.

Samuel: /* Canonical Measurement Quantities and Units */

2026-07-28T13:36:39Z

Canonical Measurement Quantities and Units

← Older revision		Revision as of 13:36, 28 July 2026
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	The canonical UCUM unit identifier is authoritative for serialization and data exchange.		The canonical UCUM unit identifier is authoritative for serialization and data exchange.

	The AOWIS identifier suffix is an ASCII-safe representation used in field names, property names, database columns, and other technical identifiers. Division is represented by <code>_per_</code>, multiplication by <code>_</code>, and ~~letter~~ case is normalized to lower case.		The AOWIS identifier suffix is an ASCII-safe representation used in field names, property names, database columns, and other technical identifiers. Division is represented by <code>_per_</code>, multiplication by <code>_</code>, and upper case is normalized to lower case.

	Each identifier suffix is explicitly defined in the following tables.		Each identifier suffix is explicitly defined in the following tables.