coli-ana is a tool for analysis of synthesized DDC numbers. The tool is being developed as part of project colibri, of which coli-conc is also a sub-project. coli-conc plans to intergrate the results of coli-ana into its infrastructure and provide information on decomposed DDC numbers in different formats (MARC, JSKOS...). The results of this tool present a great value for subject-indexers, mapping works and for the research community.