OpenWGA 5.0 - Configuration references

Java system variables

de.innovationgate.wga.lucene.keywords_as_content

Purpose: Determines if the keywords of content documents should be treated as "content" by the lucene index
Contents: true | false
Default value: false
The keywords of a content document normally are not treated as real content by the lucene index. Therefor when doing a field-unspecific search lucene - any search that does not explicitly search vor a value in a specific field - will not search the keywords field. 

But as the interpretation of the keyword field is up to the author you may enable the "content treatment" of keywords via this variable. Rebuild the whole lucene index after changing this setting and you will be able to find keyword terms in field-unspecific searches.