Can InterMedia search for the presence or absence of a tag?

We're using InterMedia's XML section indexing (Oracle8.1.6.3), and mostly it works fine. However, I think it's indexing technique means that you:
(i) cannot search for tags, eg contains(doc,'<bold>',1);
(ii) cannot search for documents that have an empty tag (eg <bold></bold>).
In both cases wildcard expansion doesn't work; for example: SQLPLUS> select doc from mytable where contains (doc, '% within publisher',0)>0;
*
ERROR at line 1:

ORA-29902: error in executing ODCIIndexStart() routine 
ORA-20000: interMedia Text error: 
DRG-50937: query too complex 
DRG-51030: wildcard query expansion resulted in too many terms 

Does anyone know of a way to do either (i) or (ii).

Many thanks, Mike Monaghan

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Author: MONAGHAN, Mike
  INET: Monagham_at_oup.co.uk

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