gml:referenceFrame

Element information

Content

• gml:TimeCalendarEra [0..1]gml:TimeCalendarEra inherits basic properties from gml:DefinitionType and has the following additional properties: - gml:referenceEvent is the name or description of a mythical or historic event which fixes the position of the base scale of the calendar era. This is given as text or using a link to description held elsewhere. - gml:referenceDate specifies the date of the referenceEvent expressed as a date in the given calendar. In most calendars, this date is the origin (i.e., the first day) of the scale, but this is not always true. - gml:julianReference specifies the Julian date that corresponds to the reference date. The Julian day number is an integer value; the Julian date is a decimal value that allows greater resolution. Transforming calendar dates to and from Julian dates provides a relatively simple basis for transforming dates from one calendar to another. - gml:epochOfUse is the period for which the calendar era was used as a basis for dating.

Attributes

Used in

• Type gml:TimeCalendarType (Element gml:TimeCalendar)

Sample instance

<gml:referenceFrame>
   <gml:TimeCalendarEra gml:id="ID">
      <gml:metaDataProperty>
         <gml:GenericMetaData>Any text, intermingled with:
            <!--any element-->
         </gml:GenericMetaData>
      </gml:metaDataProperty>
      <gml:description>string</gml:description>
      <gml:descriptionReference/>
      <gml:identifier codeSpace="http://www.example.com/">string</gml:identifier>
      <gml:name>string</gml:name>
      <gml:remarks>string</gml:remarks>
      <gml:referenceEvent>string</gml:referenceEvent>
      <gml:referenceDate>2000-01-01</gml:referenceDate>
      <gml:julianReference>1.0</gml:julianReference>
      <gml:epochOfUse>
         <gml:TimePeriod gml:id="ID">...
         </gml:TimePeriod>
      </gml:epochOfUse>
   </gml:TimeCalendarEra>
</gml:referenceFrame>