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external:tectomt:tutorial [2009/01/22 11:52]
kravalova 		external:tectomt:tutorial [2009/01/22 11:54]
kravalova
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 ===== Your turn: more tasks ===== ===== Your turn: more tasks =====
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 ==== SVO to SOV ==== ==== SVO to SOV ====
  
-**Motivation**: During translation from an SVO based language (e.g. English) to an SOV based language (e.g. Korean) we might need to change the word order from SVO to SOV. +**Motivation**: During translation from an SVO based language (e.g. English) to an SOV based language (e.g. Korean), we might need to change the word order from SVO to SOV. 
  
 **Task**: Change the word order from SVO to SOV. **Task**: Change the word order from SVO to SOV.
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   * You can use block template in ''libs/blocks/BlockTemplate.pm''.    * You can use block template in ''libs/blocks/BlockTemplate.pm''. 
-  * To find an object to a verb, look for objects among effective children of a verb (''$child<nowiki>-></nowiki>get_attr('afun') eq 'Obj' ''). That implies working on analytical layer.+  * To find an object of a verb, look for objects among effective children of a verb (''$child<nowiki>-></nowiki>get_attr('afun') eq 'Obj' ''). That implies working on analytical layer.
   * For debugging, a method returning surface word order of a node is useful: ''$node<nowiki>-></nowiki>get_attr('ord')''. It can be used to print out nodes sorted by attribute ''ord''.   * For debugging, a method returning surface word order of a node is useful: ''$node<nowiki>-></nowiki>get_attr('ord')''. It can be used to print out nodes sorted by attribute ''ord''.
-  * Once you have node ''$object'' and node ''$verb'', use method ''$object<nowiki>-></nowiki>shift_before_node($verb)''. This method takes the whole subtree under node ''$object'' and re-counts the attributes ''ord'' (surface word order) so that all nodes in subtree under ''$object'' have smaller ''ord'' than ''$verb''. That is, the method rearranges the surface word order from VO to OV.+  * Once you have the node ''$object'' and the node ''$verb'', use the method ''$object<nowiki>-></nowiki>shift_before_node($verb)''. This method takes the whole subtree under the node ''$object'' and recalculates the attributes ''ord'' (surface word order) so that all the nodes in the subtree under ''$object'' have a smaller ''ord'' than ''$verb''. That is, the method rearranges the surface word order from VO to OV.
  
 **Advanced version**: This solution shifts object (or more objects) of a verb just in front of that verb node. So f.e.: //Mr. Brown has urged MPs.// changes to: //Mr. Brown has MPs urged.// You can try to change this solution, so the final sentence would be: //Mr. Brown MPs has urged.// You may need a method ''$node->shift_after_subtree($root_of_that_subtree)''. Subjects should have attribute '''afun' eq 'Sb'''. **Advanced version**: This solution shifts object (or more objects) of a verb just in front of that verb node. So f.e.: //Mr. Brown has urged MPs.// changes to: //Mr. Brown has MPs urged.// You can try to change this solution, so the final sentence would be: //Mr. Brown MPs has urged.// You may need a method ''$node->shift_after_subtree($root_of_that_subtree)''. Subjects should have attribute '''afun' eq 'Sb'''.

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