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The SEDRIS Data Representation Model
APPENDIX B - Constraints Mandatory Metadata |
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The following table lists meta-data classes. When these classes are instanced, at least the designated fields shall be populated.
| CLASS | MANDATORY FIELDS |
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| <Access> | The classification portion of the security field shall be a non-empty string. |
| <Browse Media> | name shall be a non-empty string media_urn shall be a non-empty string in the form of a valid URN |
| <Citation> | title shall be a non-empty string originators shall be a non-empty string |
| <Description> | abstract shall be a non-empty string |
| <Keywords> | keyword_array shall be non-NULL For each entry in keyword_array, the thesaurus shall be a non-empty string. To indicate that no thesaurus is applicable, the thesaurus field shall have the value "NONE". For each entry in keyword_array, the keyword_list field shall contain a non-empty string, where keywords are separated by semicolons. For any two entries in keyword_array, either the code fields or the thesaurus fields shall have different values. |
| <Point Of Contact> | person_or_position shall be a non-empty string organization shall be a non-empty string address shall be a non-empty string voice_phone shall be a non-empty string email_address, if provided, shall be a comma-separated list of syntactically valid e-mail addresses web_site, if specified, shall be a comma-separated list of syntactically valid URLs |
| <Process> | description shall be a non-empty string |
| <Source> | description shall be a non-empty string |
This is consistent with the [CSDGM] metadata standard which requires these fields and the ISO/DIS 19115 Metadata Standard which allows for these fields.
For <Point Of Contact>, web_site = SE_STRING_DEFAULT is valid, and web_site = { SE_LOCALE_DEFAULT, 21, "http://www.sedris.org" } is valid, but web_site = { SE_LOCALE_DEFAULT, 3, "N/A" } is not.
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