This is part of archived UD v1 documentation. See http://universaldependencies.org/ for the current version.
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appos: appositional modifier

An appositional modifier of a noun is a nominal immediately following the first noun that serves to define or modify that noun. It includes parenthesized examples, as well as defining abbreviations in one of these structures.

Sam , my brother , arrived
appos(Sam-1, brother-4)
Bill ( John 's cousin )
appos(Bill-1, cousin-5)
The Australian Broadcasting Corporation ( ABC )
appos(Corporation-4, ABC-6)

In case of more than one appositive nominal, all nouns should be marked as modifying the first noun, rather than being chained:

Sam , my brother , John 's cousin , arrived
appos(Sam-1, brother-4)
appos(Sam-1, cousin-8)

Note however that nested apposition cannot be completely excluded. It may occur in combination with coordination:

You can choose between four subjects : language ( German or French ) , economy , technology and art .
appos(subjects, language)
conj(language, economy)
conj(language, technology)
conj(language, art)
cc(language, and)
appos(language, German)
conj(German, French)
cc(German, or)

appos is also used to link key-value pairs in addresses, signatures, etc. (see also the list label):

Steve Jones Phone: 555-9814 Email: jones@abc.edf
name(Steve-1, Jones-2)
list(Steve-1, Phone:-3)
list(Steve-1, Email:-5)
appos(Phone:-3, 555-9814-4)
appos(Email:-5, jones@abc.edf-6)

appos in other languages: [bg] [cs] [de] [el] [en] [es] [eu] [fa] [fi] [fr] [ga] [he] [hu] [it] [ja] [ko] [sv] [u]