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virtual void FulltextExtractor::extract ( QString &  data  )  [pure virtual]

Returns the next piece of fulltext data It is up to the plugin to decide how big each data chunk will be, but the maximum size for each call should be bounded to prevent memory problems with very large files.

When - and only when - no data is left, an empty string must be returned.

The returned text as a whole (not for each call of extract()) must be a valid XML file with the form <fulltext>..text..</fulltext> For a list of other supported tags see [TODO]

data next chunk of the fulltext xml data
List all the supported tags.

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