A few issues were discovered in SCHAC 1.5.0 release.

PDF: 1.5.0 - 2015-04-12

On page 10 in 'schacHomeOrganizationType' Format

The format description does not make much sense like it is now. Especially the part 'and assigned by the SCHAC URN Registry for this attribute at ' does not match the context.
Also updating the reference to ISO3166-2 would make sense.
How about something like this?
 

Format: urn:schac:homeOrganizationType:<country-code>:<string> <country-code> = int

<string> MUST be registered in the [SCHAC-URN-Registry] <country-code> = valid two-letter [ISO3166-2] country code

<string> from a nationally controlled vocabulary, published through the URI identified at the [SCHAC-URN-Registry] 

Typo on page 10 in 'schacHomeOrganizationType' Examples

Wrong
urn:schac:homeOrganizationType:eu:higherEducationalInstitution
urn:schac:homeOrganizationType:eu:educationalInstitution
Correct (cf. SCHAC URN registry)
urn:schac:homeOrganizationType:eu:higherEducationInstitution
urn:schac:homeOrganizationType:eu:educationInstitution

Outdated contact address on cover page

refeds@terena.org

Broken link to TF-EMC2 on page 3

A missing '>' at the end of the link:

TF-EMC2 <http://www.terena.org/activities/tf-emc2and

Use the more specific ISO3166-2 reference

  • schacCountryOfCitizenship on page 7
  • schacHomeOrganizationType on page 10
  • schacCountryOfResidence on page 10
  • schacPersonalPosition on page 12

  • schacPersonalUniqueCode on page 13
  • schacPersonalUniqueID  on page 14
  • schacPersonalPosition on page 17

ISO 3166-2 is the correct specification for the two-character ISO3166 spec.

https://en.wikipedia.org/wiki/ISO_3166-2#Current_codes 

LDAP schema: schac v: 20150413-1.5.0

Eight outdated URN Registry References

In all eight cases the reference to the URN registry is labeled as 'TERENA URN Registry' and the URL has the outdated prefix:

  • schacHomeOrganizationType

  • schacPersonalPosition (twice)
  • schacPersonalUniqueCode
  • schacPersonalUniqueID
  • schacUserStatus
  • schacProjectMembership
  • schacProjectSpecificRole
Wrong
TERENA URN Registry
http://www.terena.org/registry/terena.org/schac/
Correct
SCHAC URN Registry
https://wiki.refeds.org/display/STAN/SCHAC+URN+Registry/

Outdated URNs in comments

There are 27 occurrences of example URNs using the outdated prefix

Wrong
urn:mace:terena.org:schac
Correct
urn:schac