The Properties dialog box contains information about the current document. Some of this information is generated automatically, such as the creation date; other information is entered by the user in text fields, such as the document's subject. Office programs have nearly the same document properties, but a few are different between programs. Office stores document properties when saving to HTML, even though they do not affect the way the document appears in the browser.
To store standard document properties in an HTML file, Office uses XML contained in the Head element. The DocumentProperties element contains subelements that represent a document's properties. Document properties that Office recognizes as blank or default values might not be saved in the HTML file, and file system properties are not saved. For information about the XML elements used to store document properties and examples, see the DocumentProperties element topic.
Custom, user-defined properties are either values, or links to document content such as Microsoft Excel range names, Microsoft PowerPoint text ranges, or Microsoft Word bookmarks. To store custom document properties in an HTML file, Office uses the CustomDocumentProperties element contained in the Head element. For information and examples about how this element stores custom document properties, see the CustomDocumentProperties element topic.