Adobe acrobat 7.0.5 sdk User Manual
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Working with Metadata
A PDF document can include general information such as the document’s title, author, and
creation and modification dates. Such global information about the document itself (as
opposed to its content or structure) is called metadata, and is intended to assist in
cataloguing and searching for documents in external databases.
creation and modification dates. Such global information about the document itself (as
opposed to its content or structure) is called metadata, and is intended to assist in
cataloguing and searching for documents in external databases.
A PDF document can also contain object data. Object data is information associated with a
particular object in a PDF document.
particular object in a PDF document.
This chapter includes the following sections:
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Types of Metadata
Metadata can be stored in a PDF document in either of the following ways:
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In a document information dictionary associated with the document
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In a metadata stream associated with the document or a component of the document
Metadata properties and values are represented in the World Wide Web Consortium’s
Resource Definition Format (RDF), which is a standard metadata format based on XML.
Resource Definition Format (RDF), which is a standard metadata format based on XML.
The set of standard metadata items is organized into schemas, each of which represents a
set of properties from a particular application or industry standard. The schemas, as well as
the physical representation, are defined by Adobe’s Extensible Metadata Platform (XMP)
(see
set of properties from a particular application or industry standard. The schemas, as well as
the physical representation, are defined by Adobe’s Extensible Metadata Platform (XMP)
(see
).