Element for describing units. Use in containers UnitSet or directly incorporate into a host schema. Unit has the following child elements:
| Child | Namespace | Type | Use | Cardinality | Choice | Description |
|---|---|---|---|---|---|---|
| RootUnits | unitsml | RootUnitsType | opt. | [0, 1] | False | Container for defining derived units in terms of their root units. This allows a precise definition of a wide range of units. The goal is to improve interoperability among applications and databases which use derived units based on commonly encountered root units. |
| UnitName | unitsml | NameType | req. | [1, ∞] | False | Element containing the unit name. |
| UnitSymbol | unitsml | SymbolType | opt. | [0, ∞] | False | Element containing various unit symbols. Examples include Aring (ASCII), Å (HTML). |
Unit has the following attributes:
| Attribute | Namespace | Type | Use | Default | Fixed | Description |
|---|---|---|---|---|---|---|
| id | unitsml | xs:ID | req. | id (as an attribute name) | ||
| dimensionURL | unitsml | xsd:anyURI | opt. | URL to a representation of the unit or quantity in terms of the 7 SI base dimensions. |