biber.conf

<?xml version = "1.0" encoding="UTF-8"?>
<!-- use this from biber 1.3 on which allows to keep the keyword filed for other purposes.
<config>
<sourcemap>
    <maps datatype="bibtex" bmap_overwrite="1">
        <map>
            <per_datasource>short.bib</per_datasource>
            <map_step map_field_set="KEYWORDS" map_field_value="primary" map_append="1"/>
        </map>
        <map>
            <per_datasource>references.bib</per_datasource>
            <map_step map_field_set="KEYWORDS" map_field_value="this" map_append="1"/>
        </map>
    </maps>
</sourcemap>
</config>
-->
<config>
<sourcemap>
    <maps datatype="bibtex" map_overwrite="1">
        <map>
            <per_datasource>main.bib</per_datasource>
            <map_step map_field_set="KEYWORDS" map_field_value="primary"/>
        </map>
        <map>
            <per_datasource>references.bib</per_datasource>
            <map_step map_field_set="KEYWORDS" map_field_value="this"/>
        </map>
        <map>
            <map_step map_field_source="booktitle"
                      map_match="^Intelligent Computer Mathematics(.*)" map_replace="Proc. CICM"/>
            <map_step map_field_source="booktitle"
                      map_match="^Proceedings of the International Conference on Computational Science(.*)" map_replace="Proc. ICCS"/>
             <map_step map_field_set="series" map_null="1"/>
             <map_step map_field_set="pages" map_null="1"/>
          </map>
    </maps>
</sourcemap>
</config>