Merge pull request #546 from monarch-initiative/phenio-readme

Flesh out pheno README

docs/Sources/phenio.md

@@ -1,8 +1,27 @@
-# Phenio
+# PHENIO
 
-An ontology for accessing and comparing knowledge concerning phenotypes across species and genetic backgrounds.
+PHENIO is an ontology for accessing and comparing knowledge concerning phenotypes across species and genetic backgrounds.
 
-For more information, see:  
+Phenio provides the "semantic backbone" of the Monarch Knowledge Graph.  
+Designed as an application ontology, PHENIO integrates a variety of ontological concepts, in particular
+the "core entities" in the Monarch Knowledge Graph (KG), including diseases, phenotypes and anatomical entities.
+
+Note that while forming an integral part of the Monarch KG, PHENIO does not have a "Koza Ingest" configuration like all the other sources, 
+but is instead ingested into Monarch KG straight via a `OWL -> obographs -> KGX` transform.
+
+## Sources
+
+PHENIO integrates several different types of hierarchical relationships from a variety of sources.
+
+These include:
+* Chemical entities and relationships from [CHEBI](https://www.ebi.ac.uk/chebi/)
+* Disease entities and relationships from [MONDO](https://mondo.monarchinitiative.org/)
+* Abnormal phenotypes of humans ([HPO](https://hpo.jax.org/app/)), mouse and other mammalian species ([MPO](https://www.informatics.jax.org/vocab/mp_ontology)), the nematode worm Caenorhabditis elegans ([WBBT](http://www.obofoundry.org/ontology/wbphenotype.html)), and zebrafish ([ZFA](http://www.obofoundry.org/ontology/zfa.html)).
+
+[A full list of files used in the construction of PHENIO is available here.](https://monarch-initiative.github.io/phenio/odk-workflows/RepositoryFileStructure/)
+
+## More Information
+For more information, see:
 
 - [NCATS Translater Phenio Overview](https://github.com/NCATSTranslator/Translator-All/wiki/phenio)
 - [KGHub Phenio](https://github.com/Knowledge-Graph-Hub/kg-phenio)