4. The method, according to claim 1 , further comprising: constructing an optimization for each field of data provided in the data model.
4. The method, according to claim 1 , further comprising: constructing an optimization for each field of data provided in the data model. 5. The method, according to claim 4 , wherein the optimization is an index containing an entry for each indexed value and a corresponding node ID indicating a particular node of the schema-free database containing data corresponding to the value.