metadata

Collects a comprehensive Extensible Metadata Platform (XMP) metadata packet for the document.

Any third-party metadata is collected and converted to XMP as follows:

• All elements are given the namespace http://ns.adobe.com/xfa/promoted-desc/, with the suggested prefix desc:.

• The value of the name object becomes the object name.

• A desc:ref property qualifier is added, whose value is an XPath expression pointing back to the parent of the original desc. The order of desc objects within a single parent is not preserved. Multiple desc objects of the same name are not collected. Only the first desc object appears in the output.

• Content under the desc object is converted as follows:

  Object	XMP type
  boolean	Boolean
  date	Date
  dateTime	Date
  decimal	Real
  exData	external: URI embedded: Thumbnail
  float	Real
  image	external: URI embedded: Thumbnail
  integer	Integer
  text	Text
  time	Date

  When the XDP file is rendered as a PDF file, the collected metadata is written to the PDF file’s XMP packet. Copies of the same metadata continue to exist in the XFA stream inside the PDF file.

Reference_Syntax.metadata ( INTEGER param )

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