The schematron enforcing the templateId for Goal Observation in C-CDA 2.1 prohibits additional newer versions of that templateId (where an @extension is included with a date).  This became a problem when attempting to version the Goal Observation, as including both prior and new templateIds as follows causes an error:

<templateId root="2.16.840.1.113883.10.20.22.4.121"/>
<templateId root="2.16.840.1.113883.10.20.22.4.121" extension="2022-06-01"/>

Here is the applicable schematron from C-CDA 2.1:

<sch:assert id="a-1098-30719-c" test="((count(@nullFlavor)=1) or (count(cda:entry[count(cda:observation[cda:templateId[@root='2.16.840.1.113883.10.20.22.4.121']])=1]) > 0)) and (not((count(@nullFlavor)=1) and (count(cda:entry) > 0)))">SHALL contain at least one [1..*] entry (CONF:1098-30719) such that it SHALL contain exactly one [1..1] Goal Observation (identifier: urn:oid:2.16.840.1.113883.10.20.22.4.121) (CONF:1098-30720).</sch:assert>

For reference, here is the equivalent schematron validating Problem Observation:

<sch:assert id="a-1198-14926" test="count(cda:templateId[@root='2.16.840.1.113883.10.20.22.4.4'][@extension='2015-08-01'])=1">SHALL contain exactly one [1..1] templateId (CONF:1198-14926) such that it SHALL contain exactly one [1..1] @root="2.16.840.1.113883.10.20.22.4.4" (CONF:1198-14927). SHALL contain exactly one [1..1] @extension="2015-08-01" (CONF:1198-32508).</sch:assert>

Recommend that we update the schematron for Goal Observation to reflect how we enforce templateIds elsewhere.