Where did the javax.xml.registry.infomodel package from Jakarta EE 8 disappear to in Jakarta EE 9.1?

Question

I would specifically like to use the TelephoneNumber class which I found in the javax.xml.registry.infomodel package in the Jakarta EE 8 javadoc.

Looking in the Jakarta EE 9.1 javadocs, I can't find an equivalent package or TelephoneNumber class. I can't find any notes about its removal in the list of deprecations in either version.