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У Вас, видимо, опечатка. Должно быть Percolation Feature Percolation
MORPHOLOGY: a mechanism proposed in Lieber (1980) and Williams (1981a) which copies features of one of the members of a morphological construction (usually features of the head) to the node that immediately dominates both members. As a consequence, a complex form inherits the properties of its head. EXAMPLE: the English verb stand is a strong verb, which can be indicated by assigning the °diacritic feature [+ablaut] to this verb. The complex verb withstand also is a strong verb. This can be accounted for if one assumes that the feature [+ablaut] will percolate up to the node dominating both with and stand, as illustrated below: V V
/ \ [+abl]
/ \ / \
P V P V with stand => with stand
[+abl] [+abl] Feature Percolation Conventions
MORPHOLOGY: a set of four mechanisms originally proposed in Lieber (1980) that copy the properties of words to the node that immediately dominates them. Lieber assumes that morphemes are inserted into unlabeled trees, and these trees are then labeled by means of the following FPCs: (i) FPC I: All features of a stem morpheme, including category
features, percolate to the first non-branching node
dominating that morpheme.
(ii) FPC II: All features of an affix morpheme, including category
features, percolate to the first branching node
dominating that morpheme.
(iii) FPC III: If a branching node fails to obtain features by FPC II,
features from the next lowest labeled node automatically
percolate up to the unlabeled branching node.
(iv) FPC IV: If two stems are sisters (i.e. they form a compound),
features from the right-hand stem percolate up to the
branching node dominating the stems. Slightly different FPCs are proposed in Selkirk (1982) and DiSciullo & Williams (1987). These alternative versions make use of the notions °head and °underspecification.
LIT. Lieber (1980), Selkirk (1982), Di Sciullo & Williams (1987), Spencer (1991). http://www.sunmoon.ac.kr/~inheejo/Lexicon/ll_f.html#feature_percolation Перколяция.
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