There are a couple of important points to consider in the document info fields:
The second tab is document info which is strictly Dublin Core, thus defined by the specifications:
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| Publisher | The person or organization responsible for making the document available or for putting into print. |
| Contributors | A person or organisation responsible for making contributions to the content of the document |
| Date | A date associated with an event in the life cycle of the document, in YYYY-MM-DD format, as per ISO 8601 |
| Type | The nature or genre of the content of the document, eg. categories, functions, genres, etc |
| Format | The physical or digital manifestation of the document. Media type and dimensions would be worth noting. RFC2045,RFC2046 for MIME types are also useful here |
| Identifier | An unambiguous reference to the document within a given context such as ISBN or URI |
| Source | A reference to a document from which the present document is derived, eg. ISDN or URI |
| Language | The language in which the content of the document is written, usually a ISO-639 language code. Optionally suffixed with a hyphen and an ISO-3166 country code, eg. en-GB, fr-CH |
| Relation | A reference to a related document, possibly using a formal identifier such as a ISBN or URI |
| Coverage | The extent or scope of the content of the document, possibly including location, time and jurisdiction ranges |
| Rights | Information about rights held in and over the document, eg. copyright, patent or trademark |