The Xapian namespace contains public interfaces for the Xapian library. 
 
virtual bool check(Xapian::docid did)
Check if the specified docid occurs in this valuestream. 
 
Abstract base class for value streams. 
 
unsigned XAPIAN_DOCID_BASE_TYPE docid
A unique identifier for a document. 
 
virtual ~Internal()
We have virtual methods and want to be able to delete derived classes using a pointer to the base cla...
 
virtual void skip_to(Xapian::docid)=0
Skip forward to the specified docid.