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|  | <b>Composition rules</b> (CPWR) are used to generate compounds out of the base form.
 |  | #REDIRECT [[Composition]] | 
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|  | == When to use composition rules ==
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|  | Composition rules must be created only in case of [[multiword expressions]] with the following features:
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|  | == When not to use composition rules ==
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|  | == How to create a composition rule ==
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|  | == Examples of composition rules == 
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|  | == Compositionrules in the dictionary ==
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|  | In the UNL<sup>arium</sup> frameword, composition rules may be expressed in two different formats:
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|  | *As complex structures, such as 
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|  |  [[sub-NLW][sub-NLW]...[sub-NLW]]  {ID}  “UW”  (ATTR , ..., #01(ATTR, ...), #02(ATTR, ...), ...)  < FLG , FRE , PRI >; COMMENTS
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|  | **For further information on complex structures inside the dictionary, refer to [[Dictionary Specs#Complex]]
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|  | *As simple structures, such as
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|  |  [NLW]  {ID}  “UW”  (ATTR , ..., BF=<BASE FORM>, CPWR=MTW(<COMPOSITION RULE>) )  < FLG , FRE , PRI >; COMMENTS
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|  | **Where <COMPOSITION RULE> is the rule or set of rules used to form the lemma out of the base form, and <BASE FORM> is the [[base form]]
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|  | == Example of dictionary entries containing composition rules ==
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|  | *[[bring][back]] {12343} "202078294" (pos=VER, #01(IFX(ET0:=4>"ought")), #02(pos=PRE)) <eng, 0, 0>;
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|  | *[bring back] {12343} "202078294" (pos=VER, BF=bring, CPWR=MTW(VA([back],A,M0);)) <eng, 0, 0>;
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