Adobe PDF Schema Properties

This schema represents Adobe's core PDF-specific metadata properties, focused on document management, printing, and technical attributes. These properties are essential for:

• Document version control
• Print production workflows
• Security management
• Basic document information tracking

Note that Adobe's PDF specification has evolved over time, and some properties might be deprecated or replaced in newer versions, but these core properties remain widely used and supported.

Basic Document Properties

pdf:PDFVersion

• The version of PDF specification used to create the file
• Examples: "1.4", "1.5", "1.6", "1.7", "2.0"
• Indicates feature compatibility level

pdf:Producer

• Name and version of the software that created the PDF file
• Automatically populated during PDF creation
• Example: "Adobe PDF Library 15.0"

pdf:Keywords

• Search terms associated with the document
• Specific to PDF format and separate from XMP dc:subject
• Used in PDF document search functionality

Print Production Properties

pdf:Trapped

• Indicates the document's trapping status for printing
• Three possible states:
  • "True" - Document has been trapped
  • "False" - Document needs trapping
  • "Unknown" - Trapping status is undetermined

Security Properties

pdf:Encrypted

• Indicates whether the document is encrypted
• Boolean value (True/False)
• Relates to document security settings

pdf:Copyright

• Copyright information specific to the PDF document
• Boolean flag indicating if document is copyrighted
• Example: "True"

Technical Properties

pdf:CreationDate

• Date and time when the PDF was created
• Stored in ISO 8601 format
• Example: "2024-03-20T15:30:00Z"

pdf:ModDate

• Date and time of last modification
• Stored in ISO 8601 format
• Example: "2024-03-21T09:15:00Z"

Print Dialog Properties

pdf:PageSize

• Dimensions of the PDF pages
• Example: "A4", "Letter"

pdf:NumPages

• Number of pages in the document
• Integer value
• Example: "42"