DS-META-006 - Temporal reference system

Rule

Each ICAO data set shall, conditionally, be provided together with metadata giving a description of the temporal reference system used in the data set or a citation for a document that describes that temporal reference system when a temporal reference system other than the Gregorian calendar and Coordinated Universal Time (UTC) is used.

Requirement	Reference	DS-META-006
	Element Name	Temporal reference system
	Obligation / Condition	Mandatory if a reference system other than the Gregorian calendar and Coordinated Universal Time (UTC) is used.
	Multiplicity	0..1
ISO 19115 (2003)	Number	13
	Name	referenceSystemInfo
	Definition	Description of the spatial and temporal reference systems used in the dataset
	XPath	gmd:MD_Metadata/gmd:referenceSystemInfo
	Data type	RS_Identifier
	Domain	Free Text
	Example	ISO 8601
Implementing Instructions		-

Example

<gmd:MD_Metadata>
...
 <gmd:referenceSystemInfo>
  <gmd:MD_ReferenceSystem>
   <gmd:referenceSystemIdentifier>
    <gmd:RS_Identifier>
     <gmd:code>
      <gco:CharacterString>8601</gco:CharacterString>
     </gmd:code>
     <gmd:codeSpace>
      <gco:CharacterString>ISO</gco:CharacterString>
     </gmd:codeSpace>
    </gmd:RS_Identifier>
   </gmd:referenceSystemIdentifier>
  </gmd:MD_ReferenceSystem>
 </gmd:referenceSystemInfo>
...
</gmd:MD_Metadata>