#!/usr/bin/python
"""Eep RDF API: Inference Engine"""

__author__ = 'Sean B. Palmer'
__license__ = 'Copyright (C) 2001 Sean B. Palmer. GNU GPL 2'

import eep, query

def rule(ante, cons): 
   return eep.parse(ante), eep.parse(cons)

def filter(r, store): 
   """Give the results only - don't add to the store."""
   qres, result = query.xtquery(r[0], store), []
   for res in qres: 
      int = []
      for t in r[1]: 
         t = t[:]
         for p in (0, 1, 2): 
            if (t[p].t == 'Univar') and (t[p].r in res[1].keys()): 
               t[p] = eep.Article(res[1][t[p].r])
         int.append(t)
      result.append(int)
   return result

def apply(rule, store, NTriples=0): 
   for r in filter(rule, store): store.extend([x for x in r])
   return [store, eep.serialize(store)][NTriples]

if __name__=="__main__": 
   print __doc__