Including a publication date in ebooks is highly recommended. Providing this information programmatically ensures that reading systems and search engines can identify, index, and categorize the content accurately.

Objectives

• Provide publication dates to reading systems and indexing tools.
• Improve content categorization and ranking within reading applications.

Implementation

• Use the dc:date metadata element to specify the publication date.
• Use the dcterms:modified metadata element to indicate the date of the last modification made to the file.

Control

• Check that the dc:date metadata is present and accurate.
• Verify that the dcterms:modified metadata is present and correctly reflects the last update.