nitf:chron 

Partial description	Date and time.
Full description	Used to normalize inline date and time references.

Element Information

Model

Attributes

QName Type Fixed Default Use Inheritable Annotation
class string optional 
An open placeholder for categorization.
id ID optional 
An XML-specific identifier for the element.
norm string optional 
Date/time value normalized to ISO 8601: YYYYMMDDTHHMMSS-HHMM (preferred) YYYYMMDDTHHMMSSZ (alternative). Use YYYYMMDD000000-HHMM when no time is available
style string optional 
An open placeholder for reference by an external stylesheet.
xml:lang union of(xs:language, restriction of xs:string) optional 
Attempting to install the relevant ISO 2- and 3-letter
         codes as the enumerated possible values is probably never
         going to be a realistic possibility.  See
         RFC 3066 at http://www.ietf.org/rfc/rfc3066.txt and the IANA registry
         at http://www.iana.org/assignments/lang-tag-apps.htm for
         further information.

         The union allows for the 'un-declaration' of xml:lang with
         the empty string.
Wildcard: ANY attribute from ANY namespace OTHER than 'http://iptc.org/std/NITF/2006-10-18/'

Used By

Element Group nitf:enrichedText

Source 

<element name="chron">
  <annotation>
    <documentation>Partial description Date and time. Full description Used to normalize inline date and time references.</documentation>
  </annotation>
  <complexType mixed="true">
    <attributeGroup ref="nitf:commonNITFAttributes"/>
    <attribute name="norm" type="string" use="optional">
      <annotation>
        <documentation>Date/time value normalized to ISO 8601: YYYYMMDDTHHMMSS-HHMM (preferred) YYYYMMDDTHHMMSSZ (alternative). Use YYYYMMDD000000-HHMM when no time is available</documentation>
      </annotation>
    </attribute>
  </complexType>
</element>

Sample