View source for CBA-2-Week 1

==== New Feature Geometry ====

The geometry of the feature structures of Ginzburg and Sag (from here on simply GS) differs slightly from that of Pollard and Sag (1994). Here is the general structure of a sign:

[[File:GS-feature-geometry.jpg|center|The feature geometry of Ginsburg and Sag (2000)]]

We find the following differences from the earlier feature geometry:

# Instead of a SUBCAT list, there is now an ARG-ST. Only signs of type ''word'' have this list-valued attribute. Like SUBCAT, it contains all the syntactic arguments of a word. Unlike SUBCAT, this list is not used for head-driven phrase formation, however! It is used, among others, for the Binding Theory.
# As part of the ''category'' information of the sign, we now find the 3 valence attributes SUBJ, SPR, and COMPS. Together with combinatorial schemas, they drive phrase formation from the information in the head daughter. They have the following properties:
* SUBJ: the list contains 0-1 ''synsem'' objects
* SPR: the list contains 0-1 ''synsem'' object
* Comps: the list contains 0-3 ''synsem'' objects

==== Some Words in the New Feature Geometry ====

The word ''I'':

[[File:Word_I.jpg|The word ''I'']]

The word ''a'':

[[File:Word_a.jpg|The word ''a'']]


==== Phrases ====

Unlike Pollard and Sag (1994), GS give subtypes to the type ''phrase'' which reflect the functional relationship between the head daughter and the non-head daughter(s). The following phrase types exist:

[[File:GS-p32-nr30.jpg]]

===== Head-Complement Phrases =====

A Head-Complement Phrase is formed from a word and one phrase for each of the ''synsems'' on the head's COMPS list. There has to be a 1:1 relation between the selected ''synsems'' and the phrases:

[[File:GS-hd-comp-ph.jpg]]


===== Head-Specifier Phrases =====

In a Head-Specifier Phrase a head combines with a phrase whose ''synsem'' is token-identical to the ''synsem'' on the head's SPR list:

[[File:GS-hd-spr-ph.jpg]]

===== Head-Subject Phrases =====

In a Head-Subject Phrase a head combines with a phrase whose ''synsem'' is token-identical to the ''synsem'' on the head's SUBJ list:

[[File:GS-hd-subj-ph.jpg]]

Note that unlike in Pollard and Sag (1994), subjects of verbs combine with the head in a Head-Subject Phrase, whereas determiners combine with the nominal they specify in a Head-Specifier Phrase!

=== Homework for next time ===

# Read p. 17-38 in GS (ignore the section on lexemes at the beginning!
# Study the type definitions in these pages and make sure you understand them!