MultiLanguage support for Oracle Text

Hi,
We are providing multi language support in our application. So, we are using the NVarchar datatype. And we want to provide the search option for that text. So if i tried to create an index on that column it is giving the error and unable to create the index on that column. Same if tried to create an index on Char and Varchar datatypes it was successfully created the index on those columns and search is working fine.
But according to our requirements, we should provide the multi language support in our application.
Please suggest me how to create indexes on NVarchar datatype and providing the oracle text search features on that datatype.
Waiting for your favourble reply.
Thanks in advance.
Regards,
Anil.

No place in the standard docs very well. There was a note I found on it at one point, but I can't find the number at the moment. 10g new features for Text note has some info on it though. I'll look again tomorrow.
I did a lot of research on the world_lexer a few months back (wrote some info on IR & Oracle Text our newest Oracle Press book), and got some good info from the product team. One of the chapters covering Text will be made available for free and there is a diagram in there of how the world_lexer processes text. I'll post the link to the forum when it is available.
Since it doesn't require a language column, it attempts to auto-recognize the text...but not really the language. More like...the type of text it is. White-space delimited languages like English or Spanish are easy to break into tokens. Japanese & Korean are another story...no white-space delimiter. Arabic is yet another story. Those are essentially the buckets that text is thrown into for breaking into tokens when using the world_lexer.
So, where does German fall? It will be broken up similar to English. But what about the special features (like alternate spelling) that are available? Nope - sorry. It doesn't know German from French. With the multi_lexer you defined sub-lexers and told Text which records were German or French. This means that you can use more of the lang features with it. The world_lexer is much easier to implement and maintain, but it is a trade-off.
Hope that defines it a little better.

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