ELMO V1.6 refers to

• ISO/IEC 5218 code of human gender
  not answering the need to express "non-binary genders",
  see some discussions on this here CPV1.00gender is nomina periculosa; not aligned with opinion on gender by World Health Organization et al.; de facto implementer's usage contains xenonyms; untranslatable SEMICeu/Core-Person-Vocabulary#38 or Adaption of the gender for intersex and/or transgender people SEMICeu/Core-Person-Vocabulary#7

• has a (V1.5 from 2019) added property called "bday" to express Date of Birth

• puts birthplace information (place, country) of the learner in a single string placeOfBirth

At the same time a more standardised way exist with the ISA Core Vocabularies https://joinup.ec.europa.eu/collection/semantic-interoperability-community-semic/solution/e-government-core-vocabularies/release/200-0 to express
Natural Persons and the different name types and birth (and death information)

The ISA Core vocabulary Person features concepts like CountryOfBirth AND PlaceOfBirth has a DateOfBirth and different "name" concepts including matronymic and patronymic names and alternative representation of names.
https://github.com/SEMICeu/Core-Person-Vocabulary/blob/master/releases/2.00/html/overview.jpg

Another orientation point could be the eIDAS minimum attributes on persons that will a Higher education institution will get in future in a request in the SDG article 14 system.
http://mapping.semic.eu:81/vdm/about/html/http%3A%2F%2Fmapping.semic.eu%2Fvdm%2Fid%2Fcv%2Feb004434a93bbeaa2ba5968d26af06be

For the sake of a EU interoperable ELMO 2.X being kind of aligned with SDG, Europass and other European data exchanges we suggest to align existing and future ELMO
a) element names
b) data types
c) and descriptions
towards ISA Core Vocabularies or towards other Interoperability standards when it comes to express information on the (European) learner.

The following actions would be needed for an alignement to the ISA Core Vocabulary Person:

• rename bday -> DayOfBirth
• rename givenNames -> givenName
• add countryOfBirth
• add fullname
• add alternative name
• change ISO-Gender to Publications Office gender code lists