Documentation for Geography Markup Language
Definition Type: Element
Name: realizationEpoch
Namespace: http://www.opengis.net/gml
Type: date:http://www.w3.org/2001/XMLSchema
Containing Schema: datums.xsd
MinOccurs 0
MaxOccurs (1)
Abstract
Documentation:
The time for which this datum definition is valid. This time may be precise (e.g. 1997.0 for IRTF97) or merely a year (e.g. 1983 for NAD83). In the latter case, the epoch usually refers to the year in which a major recalculation of the geodetic control network, underlying the datum, was executed or initiated.
Collapse XSD Schema Diagram:
XSD Diagram of realizationEpoch in schema datums_xsd (Geography Markup Language)
Collapse XSD Schema Code: 
<xsd:element name="realizationEpoch" type="date" minOccurs="0" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <xsd:annotation>
        <xsd:documentation>The time for which this datum definition is valid. This time may be precise (e.g. 1997.0 for IRTF97) or merely a year (e.g. 1983 for NAD83). In the latter case, the epoch usually refers to the year in which a major recalculation of the geodetic control network, underlying the datum, was executed or initiated. </xsd:documentation>
    </xsd:annotation>
</xsd:element>
Documentation for Geography Markup Language

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