Hi Joao,
For the SCIM attribute names, the best places to consult are the SCIM RFCS:
https://tools.ietf.org/html/rfc7643
https://tools.ietf.org/html/rfc7644
Specifically check out Section 4.1 "User" Resource Schema
https://tools.ietf.org/html/rfc7643#section-4.1
For the LDAP attribute names, that would be LDAP system specific, so you'll need to consult the LDAP vendor information there.
As for adding new attributes, it is not currently possible to add new attribute names to the existing user profile schema. You can overload existing, unset attributes with your required LDAP data, however that isn't a very graceful workaround.
I believe there is an RFE open for support of custom attributes, please feel free to vote on it so that we can prioritise adding that feature to the product.
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Jasmine
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