This directory contains supplemental XP definitions yet to be moved into gene_ontology_edit.obo

For context, please see:

http://wiki.geneontology.org/index.php/Category:Cross_Products

In general the file names have the following structure

   <Ont1>_xp_<Ont2>.obo

This means the file extends Ont1 with logical definitions that reference Ont2. Ont1 is always one of the 3 GO ontologies.

Other files:

  *.relstats
        Summarises the relations used in this xp set

  *.correl
        For any XP relationship that spans 2 GO ontologies we can ask how correlated the resulting annotations are;
        specifically, if the XP set has a relationship <source R target> we can ask what is p(target|source).
        For example, what is the probability of a gene being annotated to 'mitochondrion' if it is annotated to 'mitochondrial translation'?
        We expect there to be some correlation if the terms are related. In some cases (such as the above) we may expect p ~ 1.

        The columns are
            <source-class> <relation> <target-class> <#genes(source^target)> <#genes(target)> <p(target|source)>

  *.correl.avgs
        averages over correlations for each relation.

        The columns are
            <relation> <avg(p)> <sum(p)> <total-xps>

        TODO: more statistically sound aggregation