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L03 FS: Heads and inheritance of feature-structures Head Daughter of a Tree o There are typically many daughters (children) of a node. o One of the daughters of a node is the "HEAD" node. + Ex. For the NP node, the head is the 'noun' node. o Properties of the head-node are inherited by the mother node. + For ex., feature-structure with the 'noun' node can be unified with (copied to) NP node. NP / | \ / | \ / | \ noun apostrophe noun | | | Ram 's house . . . . [CAT det ] [ CAT n ] [SPEC def ] [ NUMBER sg ] [ PERSON 3 ] [ ROOT house ] - This inheritance rule represents the fact that if you say Ram's house is beautiful you are referring to the house, and not to Ram. In other words, NP refers to what the noun refers. Other components of the phrase specify other properties, but are not the same as the NP...........................................NEXT PREVIOUS INDEX