Table of Contents

 1     Scope          
 2     Normative references         
        2.1     Identical Recommendations | International Standards
        2.2     Additional references
 3     Definitions
        3.1     Imported definitions 
        3.2     Additional definitions
 4     Abbreviations and acronyms             
 5     OID resolution system architecture
        5.1     OID resolution process             
        5.2     Interactions between components in the general OID resolution process          
 6     DNS zone files for the ORS domain 
        6.1     Overview       
        6.2     Requirements and restrictions on DNS zone files in the ORS domain    
        6.3     Use of DNS resource records for ORS services
        6.4     Security considerations            
 7     Operation of an ORS client 
        7.1     Functional interfaces
        7.2     Processing a query     
        7.3     Converting an OID-IRI value to an FQDN           
        7.4     Processing DNS results             
        7.5     Security considerations            
        7.6     Local performance considerations      
 8     Requirements for ORS service specifications              
        8.1     Specification of NAPTR information    
        8.2     Recommendations for ORS application processing       
Annex A – Assigned ORS service types    
Annex B – Specification of the canonical OID (COID) ORS service    
Annex C – Specification of the child information (CINF) ORS service    
        C.1     General          
        C.2     CINF XML file
Annex D – Specification of the registration information (RINF) ORS service    
        D.1     General         
        D.2     RINF XML file
Annex E – Specification of the module information (MINF) ORS service    
Annex F – Description of use cases    
        F.1     Canonical OID (COID) ORS service        
        F.2     Child information (CINF) ORS service  
        F.3     Registration information (RINF) ORS service    
        F.4     Module information (MINF) ORS service           
Annex G – Examples of ORS operation    
        G.1     Example of DNS zone files for the ORS              
        G.2     Examples of NAPTR resource records
Annex H – Implementation guidance for a local cache and copies of ORS zones    
        H.1     Local cache for OID resolution              
        H.2     Local copies of ORS zones      
        H.3     Local copies of ORS zones independent of the local DNS           
Annex I – Operational guidance for ORS operators    
Annex J – Changes and compatibility of this edition of this Recommendation | International Standard    
Annex K – History of object identifiers    
Bibliography