Morphology. What is morphology? Finite State Transducers Two Level Morphology. What is morphology?. Decomposition of words into meaningful units: anti dis establish ment arian ism Interacts with- syntax( categories and word order)
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What is morphology?
Finite State Transducers
Two Level Morphology
lexical- semantic analysis
Morphological combinations as words?
What does the morphological analyzer have to output?
INFIXATION: ( TAGALOG)
fikas - strong
fumikas - be strong
Kick + er
CIRCUMFIXATION: ( German)
ge [sag] t past prefix [say] past suffix
Jump/jumped hit/hit bring/brought sing/sang
adore/adorable, kick/kickable, fax/faxable
produce/production destroy/destruction *graft/graftuction
leben+ versicherung + gesellschaft+s+angesteller
life insurance company +Poss employee
Turkish verns have 40k forms
Agglutinative ( concatenative) languages are well behaved for FSAs
as long as we don’t include phonological or spelling changes
*hopp+ed hop, ???
The lexicon stores the lemmas, and divides them into adjective classes
State sequence indicates order of morpheme composition
e.g. comparative or adverb formation is by suffixation
Need to relate lexical level, the level that gives us the morphological
analysis (+plural,+able to the surface level that keeps track of
or graphological (spelling_ changes)
Q= finite set of states q Inflection0 to qn
finite alphabet of complex symbols (feasible pairs)
i:o with one symbol from the input alphabet
Q0 = the start state
F= set of final states
= (q, i:o) the transition function or matrixbetween
states. Takes a state from Q and a complex symbol
i:o from and returns a new state.
feasible pair: a relation of a symbol on one tape to a symbol
on the other tape.
e.g. can + [pl:^s]
trie Inflection: in lexicon, categories arranged by letter one at a time with
class at end. Allows parallel search as long as things match
e.g. m*e*t*a*l <N> m*e*t*a <root>
^ __ s #
e --> e /
Parse Example 1: unionizable
Parse Example 2: assess