Temporal Coverage


Definition

A union of the DIF metadata event date fields with the ECHO event time fields.

  • <Metadata_Creation> refers to the date the metadata was created.
  • <Metadata_Last_Revision> refers to the date of the last metadata revision.
  • <Metadata_Future_Review> refers to a date in the future when the metadata.
  • <Metadata_Delete> refers to a date when the metadata will be deleted.
  • <Data_Creation> refers to the date the data was created.
  • <Data_Last_Revision> refers to the date of the last data revision.
  • <Data_Future_Review> refers to a date in the future when the metadata will be revised.
  • <Data_Delete> refers to a date when the data will be deleted.
 
Syntax 
<Metadata_Dates>    
   <Metadata_Creation>A date, dateTime, or Enumeration</Metadata_Creation>    
   <Metadata_Last_Revision>A date, dateTime, or Enumeration</Metadata_Last_Revision>    
   <Metadata_Future_Review>A date, dateTime, or Enumeration</Metadata_Future_Review>    
   <Metadata_Delete>A date, dateTime, or Enumeration</Metadata_Delete>    
   <Data_Creation>A date, dateTime, or Enumeration</Data_Creation>    
   <Data_Last_Revision>A date, dateTime, or Enumeration</Data_Last_Revision</Data_Last_Revision>    
   <Data_Future_Review>A date, dateTime, or Enumeration</Data_Future_Review>    
   <Data_Delete>A date, dateTime, or Enumeration</Data_Delete>  
</Metadata_Dates>
 
Usage
  • <Metadata_Dates> is required and may not be repeated. Subfields may be repeated.
  • All values should be in date format (YYYY-MM-DD) or dateTime format (YYYY-MM-DDTHH:MM:SS). Other accepted values may include: unknown, present, unbounded, or future.
  • <Metadata_Creation> is a required subfield.
  • <Metadata_Last_Revision> is a required subfield.
  • <Metadata_Future_Review> is optional.
  • <Metadata_Delete> is optional.
  • <Data_Creation> is a required subfield.
  • <Data_Last_Revision> is a require subfield.
  • <Data_Future_Review> is optional.
  • <Data_Delete> is optional.
Example 
<Metadata_Dates>    
   <Metadata_Creation>2014-01-01</Metadata_Creation>    
   <Metadata_Last_Revision>2015-01-01</Metadata_Last_Revision>    
   <Metadata_Future_Review>2016-01-01</Metadata_Future_Review>    
   <Metadata_Delete>2020-01-01</Metadata_Delete>    
   <Data_Creation>2014-01-01</Data_Creation>    
   <Data_Last_Revision>2015-01-01</Data_Last_Revision>    
   <Data_Future_Review>2016-01-01</Data_Future_Review>    
   <Data_Delete>2020-01-01</Data_Delete>  
</Metadata_Dates>

 

This document should be cited as:
Directory Interchange Format (DIF) Writer's Guide, 2022.
International Directory Network.
National Aeronautics and Space Administration.
[https://idn.ceos.org/defaultDif10/].