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