DS-META-003 - Validity of the data set

Rule

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

The start of the validity of the data set is based on the "effective date" of its data. Although this is may be an AIRAC date, it can be any date. This is particularly true for obstacle data sets that do not need to follow AIRAC.

The end of the validity of the data set is based on the date and time when the first data ceases to have effect. In many cases this will be at an indeterminate time in the future.

The validity of the data set is different from the date and time when the data set is provided but is not yet effective (DS-META-002 - Date and time when provided).

More information on baseline data and updates is available at Data set variants.

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 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>

Example 2: 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>