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ucid, mxw-id, load_-source

See Common XML Attributes.

appl-type

This field contains a single-digit number which indicates the type of patent, as follows: 
1=Utility, 2=Reissue, 4=Design, 5=Defensive Publication, 6=Plant, 7=Statutory Invention Registration (Only for US)

us-art-unit

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

us-series-code

A series code is a two-digit number (leading zero removed). For a detailed review of time periods, please see http://www.uspto.gov (Only for US)

is-representative

Optional, YESlNO. This attribute indicates whether the document is the family representative in the EPO simple family.

country

The 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 number numbers in DOCDB format has have changed since late 2010 (beginning of series code 13) (See , 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, please 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 (A=patent; , U=utility; , P=provision; , W= PCT; , F=design; , T=translation)

date

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Date of filing (YYYYMMDD)

lang

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