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Rule

Each ICAO data set shall be provided together with metadata giving the validity of the data set

Requirement

Reference

DS-META-003



Element Name

Validity of the data set



Obligation / Condition

Mandatory



Multiplicity

1


ISO 19115 (2003)

Number

351



Name

extent



Definition

Date and time for the content of the dataset



XPath

gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:temporalElement/gmd:EX_TemporalExtent/gmd:extent/gml:TimePeriod



Data type

TM_Primitive



Domain

Date described according to ISO 19108



Example

From: 2010-11-01T00:00:00Z
Until 2010-12-24T24:00:00Z


Implementing Instructions



When the end date is unknown follow the usual AIXM encoding instructions (use indeterminatePosition="unknown" for the end of validity).


Example 1: End Date is Known
<gmd:MD_Metadata>
...
 <gmd:identificationInfo>
  <gmd:MD_DataIdentification>
   ...
   <gmd:extent>
    <gmd:EX_Extent>
     <gmd:temporalElement>
      <gmd:EX_TemporalExtent>
       <gmd:extent>
        <gml:TimePeriod gml:id="period1">
         <gml:beginPosition>2010-11-01T00:00:00Z</gml:beginPosition>
         <gml:endPosition>2010-12-24T24:00:00Z</gml:endPosition>
        </gml:TimePeriod>
       </gmd:extent>
      </gmd:EX_TemporalExtent>
     </gmd:temporalElement>
    </gmd:EX_Extent>
   </gmd:extent>
  </gmd:MD_DataIdentification>
 </gmd:identificationInfo>
...
</gmd:MD_Metadata>
Example 2: End Date is Unknown
<gmd:MD_Metadata>
...
 <gmd:identificationInfo>
  <gmd:MD_DataIdentification>
   <gmd:extent>
    <gmd:EX_Extent>
     <gmd:temporalElement>
       <gmd:EX_TemporalExtent>
       <gmd:extent>
        <gml:TimePeriod gml:id="period1">
         <gml:beginPosition>2010-11-01T00:00:00Z</gml:beginPosition>
         <gml:endPosition indeterminatePosition="unknown"/>
        </gml:TimePeriod>
       </gmd:extent>
      </gmd:EX_TemporalExtent>
     </gmd:temporalElement>
    </gmd:EX_Extent>
   </gmd:extent>
  </gmd:MD_DataIdentification>
 </gmd:identificationInfo>
...
</gmd:MD_Metadata>
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