Hello-

I'm experiencing a weird issue searching an index. The
index has information about books, and one of the
fields is the ISBN number. It is stored in the index
in untokenized form to enable searches by ISBN. So a
query like "isbn:0071490833" would return the Document
for that book. But it doesn't find the document if the
ISBN ends in an "X", like "isbn:007149216X".

I know it's stored correctly, because if I retrieve
the document through a different query, I see that the
field contains the correct value.

It also works fine if I search for "isbn:007149216?".

Is the "X" some kind of special syntax?

Many thanks in advance for any hints,
Ulf



      

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