* adding xref mapping for ZFS
 * some changes in generic stages based on Frederics recommendations
 * NTs for specific diaphyses/shafts
 * Demoting some WP text defs to ext defs, adding standard form text defs in place. Completing some WP defs for bones
xref RO for immediately_preceded_by. qualified some syns
UMLS xrefs, derived from NCIT
 * aligned staging relations with latest RO
     * aligned staging relations with latest RO
     * adding xref mapping for ZFS
     * some changes in generic stages based on Frederics recommendations
     * NTs for specific diaphyses/shafts
     * Demoting some WP text defs to ext defs, adding standard form text defs in place. Completing some WP defs for bones
     * stages:
      * added xrefs for intermediates stages in zebrafishstages.obo
      * mapped ZFA unknown
      * xref to neurolex age categories
     * embryonic / reproductive system:
      * NTs: vesicular appendage of epoophoron, remnnant of {ductus deferens, processus vaginalis}, canal of nuck, paradidymis, paroophoron, vesicular appendage of epoophoron
      * syns for processus vaginalis peritonei
      * mesonephric duct derivatives - followed ehdaa2 and included intermediate structures.
     * nervous system
      * added def of stria medullaris from butler & hodos
     * aligning with embryology subset of WP
      * added new wikipedia xrefs
      * NTs: embryonic urethral groove, vaginal plate, sinovaginal bulb
     * Added experimental  confers_advantage_in links to ENVO
     * NT: otic notch
     * new glands from WP import
      * NT: violet, alveolar, Ciacco/wolfring, Moll, Henle, eyelid glana, supraorbitald
      * NT serous acinus^L
     * NT: ventrum, ventral trunka
     * NT: caudofemoralis
     * genital development
      * NTs: future glands (generic, male, female)
     * sourced additional text defs from WP; demoted some defs to external_definitions
     * NT: foramen of panizzi
     * glands/secretions:
      * NTs: anal gland secretion, cerumen gland
     * wikipedia mammals category alignment
      * NTs: hypogastrium, epipublic bone, udder, zygomatic plate,  entepicondylar foramen, ossicone, eimer organ, nasal tentacle, Grueneberg ganglion
     * Nervous system
      * added logical defs for grey and white matter terms; fixed text defss
     * olfactory system changes
      * various fixes based on discussion with MM and reading Bulter+Hodos
      * NT: telencephalic white matter
      * NT: olfactory pathway
      * changes to parthood relations for bulb, cortex, tract. some demoted to overlaps
     * overhaul of keratinized structures and oral epithelium
     * NTs: ovarian medulla, ovarian cortex (required for CL)
 * use new Bgee stages for xrefs
new