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--- external:tectomt:tutorial [2009/01/21 11:36]
kravalova
+++ external:tectomt:tutorial [2009/01/21 11:59]
kravalova
@@ Line 86: / Line 86: @@
 This tutorial itself has its blocks in ''libs/blocks/Tutorial'' and the application in ''applications/tutorial''.
@@ Line 97: / Line 101: @@
 {{ external:tectomt:pyramid.gif?300x190|MT pyramid in terms of PDT layers}}
-TectoMT blocks repository is saved in ''libs/blocks/''. In correspondence with ..., the blocks are located in directories describing their purpose.
+The notion of 'layer' has a combinatorial nature in TectoMT. It corresponds not only the layer of language description as used e.g. in the Prague Dependency Treebank, but it is also specific for a given language (e.g., possible values of morphological tags are typically different for different languages) and even for how the data on the given layer were created (whether by analysis from the lower layer or by synthesis/transfer).
 Thus, the set of TectoMT layers is a Cartesian product {S,T} x {English,Czech,...} x {W,M,P,A,T}, in which:
@@ Line 104: / Line 108: @@
   * {English,Czech...} represents the language in question
   * {W,M,P,A,T...} represents the layer of description in terms of PDT 2.0 (W - word layer, M - morphological layer, A - analytical layer, T - tectogrammatical layer) or extensions (P - phrase-structure layer).
+Blocks in block repository ''libs/blocks'' are located in directories indicating their purpose in machine translation.
 //Example//: Block adding Czech morphological tags (pos, case, gender, etc.) can be found in ''libs/blocks/SCzechW_to_SCzechM/Simple_tagger.pm''.

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