These are Schema related LDAP SearchFilters which show LDAP Query Examples that can be used to find information specific to the Schema LDAP.
The RFC recommend that the RootDSE Example publish an entry for "SubschemaSubentry".
The SubschemaSubentry is the DN of the location of the schema.
A typical entry is:
subschemaSubentry: cn=schema
Once this value is obtained the ldapsearch command may be used to obtain the schema for the LDAP server:
ldapsearch -h yourLDAPDNS -b "cn=schema" -s base -D cn=admin,ou=...,dc=yourdomain,dc=com -w secretpassword "(objectclass=*)" >2008-11-09-schema.ldif
Some LDAP Server Implementations prefer this type of syntax.
ldapsearch -h yourLDAPDNS -b "cn=schema" -s base -D cn=admin,ou=...,dc=yourdomain,dc=com -w secretpassword "(objectclass=*)" attributeTypes dITStructureRules objectClasses nameForms dITContentRules matchingRules ldapSyntaxes matchingRuleUse
This will store the schema in an LDIF file named 2008-11-09-schema.ldif.