Graphical representation of the different terms we added to OBI (the Ontology of Biomedical Investigations) used to describe single nucleotide resolution nucleic acid structure mapping (SNRNASM) experiments. Each term is assigned a unique identifier (e.g., OBI:0001014) and organized by a series of hierarchical relationships. We used “is a” relationships in this case. For example DNAse I structure mapping (OBI:0001016) “is an” enzymatic mapping (OBI:0001014) experiment, which “is an” SNRNASM (OBI:0000807). In organizing our description of structure mapping experiments in this way, it becomes possible to design algorithms that will automatically identify relationships between different data sets.
