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ucid

See Common XML Attributes.

lang

Language of publication, 2-character code based on ISO 639-2. The default value is "XX" if no language information is provided by the data sources.

country

See publication-reference.

doc-number

See publication-reference.

kind

See publication-reference.

date

See publication-reference.

date-produced

Date that the complete XML document was created (YYYYMMDD).

modified-load-id

family-id

DOCDB-assigned simple family identifier. The default value is "-1"

Note: The default family id is -1.  If you see this value, there are two possible explanations:

1. The record is not available in DOCDB.
2.  We have not yet received the DOCDB record. In this case, the family id will be populated once we receive the DOCDB record.