This suggests that SPARQL- DL [SP07] could be used instead of SPARQL to translate from the LISQL syntax. However, this is not possible because SPARQL-DL is restricted to conjunctive queries, and variables cannot occur in complex classes. On one hand, a LISQL query that contains disjunctions and negations but no variables (hence no cycles) and the default focus, can be translated to a SPARQL-DL query in the form Type(?x,C), where C is a complex class that has the same abstract syntax as the LISQL query. For example, the LISQL query a man and birth : (year : (1601 or 1649) and place : not in England) can be translated to Type, \{1649\})), some(place, not(some(in, \{England\}))) )))), p.1601 ,
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