I think the core schema is in use as it is in the
/etc/ldap/slapd.d
/cn=config
cn=config.ldif
/etc/ldap/slapd.d/cn=config
cn=module{0}.ldif
cn=schema.ldif
olcDatabase={-1}frontend.ldif
olcDatabase={0}config.ldif
olcDatabase={1}mdb.ldif
/etc/ldap/slapd.d/cn=config/cn=schema
cn={0}core.ldif
cn={1}cosine.ldif
cn={2}nis.ldif
cn={3}inetorgperson.ldif
Thanks
Bob H