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ucid, mxw-id, load-source

See Common XML Attributes.

appl-type

Single-digit number which indicates the type of patent. Values include: 

1=Utility
2=Reissue
4=Design
5=Defensive Publication
6=Plant
7=Statutory Invention Registration (US Only)

us-art-unit

Identifies a group of examiners who specialize in a specific technology or art (US Only)

us-series-code

Two-digit number (leading zero removed). For a detailed review of time periods, see http://www.uspto.govFiling Years and Patent Application Serial Numbers and Application Number and Filing Receipt (US Only)

is-representative

Indicates whether the document is the family representative in the EPO simple family. Optional, YESlNO.