The name of a file to use to automatically separate a compound word into root words at both indexing and query time. For example, the German word for bicycle pump is a single word fahrradpumpe that can be divided into fahrrad and pumpe.

The file must have the following format:

rollercoaster roller coaster
hemidemisemiquaver hemi demi semi quaver

Each line of the file defines the decomposition for one word. The first word on a line is broken down into the remaining words on the line.


IDOL Content Component also stems each of the terms that the decomposition produces.

You must store the decomposition file in the LanguageDirectory.


If you specify a full path to the Stoplist, you must also use a full path in the DecompositionFile and StemmingFile parameters. If you do not specify a path to the Stoplist, you must use only the file name in the DecompositionFile and StemmingFile parameters (that is, you must place these files in the LanguageDirectory).

Type: String
Required: No
Configuration Section: LanguageTypes or MyLanguage
Example: [German]
See Also: DiminishSeparators

If you change this setting after you have indexed content into IDOL Server, the new setting applies only to new content, and the server logs a warning. To clear the warning and ensure that your change applies to all your content, you must initialize your index and reindex the content.