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 Filing 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.

format

Designates the normalized or not-normalized format of the following document-id. 
"epo" is the standardized DocDB format. 
"original" is the unparsed format directly from the data source.

country

Country is represented by a standard 2-character code based on WIPO ST.3. In the case of WO publications, the country is the authority where the application was filed.

doc-number

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doc-number is provided in both DocDB-normalized format and in the format provided by the publishing patent office. DocDB-normalized format usually includes the filing year (2 or 4 digits) at the beginning or end unless the year is already embedded in the application number.

• US application numbers in DocDB format have changed since late 2010 (beginning of series code 13, see link below for more details). USPTO "original" format always includes a prepended series code. 
• WO application numbers are formatted with a 2-digit year followed by a 5-digit serial number prior to 2004-01-01. Beginning with application dates in 2004, the format is 4-digit year followed by 6-digit serial number (e.g. 9813495 or 2004000001). A kind code of "W" must be used to distinguish WO applications from national office applications.
• JP application numbers include a 2-digit year as suffix until 2000; thereafter the 4-digit year is prepended (e.g. 131699 or 2007000849). 

For a complete discussion of application numbers in DocDB over time and over multiple authorities, see Number format concordance - application numbers at 
https://www.epo.org/searching-for-patents/helpful-resources/data/tables/regular.html.

kind

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Kind code of applications comes from DocDB. Values include:

A=Patent
U=Utility
P=Provisional application
W= PCT
F=Design
T=Translation

date

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Date of filing (YYYYMMDD)
Note: If no date is present and a document-id element exists, a default value of 00010101 is inserted.

lang

Original language of filing, 2-character code based on ISO 639-2.
Note: The default value is "XX" if no language information is provided by the data source.