# xbib Contextual Query Language Compiler for Java

CQL, the Contextual Query Language, is a formal language for representing queries to information retrieval systems.
Its objective is to combine simplicity with expressiveness, to accommodate the range of complexity from
very simple queries to very complex. CQL queries are intended to be human readable and writable, intuitive,
and expressive.

This Java implementation can parse and generate CQL syntax, and translates CQL to Elasticsearch query language.
It also support extensive query options, filter queries and faceting, with breadcrumb state support
(checkboxes to add or remove facte values from a query).

More about CQL can be found under
link:http://docs.oasis-open.org/search-ws/searchRetrieve/v1.0/os/part5-cql/searchRetrieve-v1.0-os-part5-cql.html[the searchRetrieve 1.0 CQL specification].

## License

Copyright (C) 2012 Jörg Prante

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
you may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.


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