A Uniform Resource Name (URN) Namespace for SCTE

The SCTE standards program is an ANSI-accredited forum for the development of technical specifications supporting cable telecommunications. SCTE standards work includes: data and telephony over cable; application platform development; digital video; emergency alert systems; network monitoring systems; cables, connectors and amplifiers; construction and maintenance practices; energy management, and more. Occasionally, SCTE specification efforts require identifiers in a managed namespace so that they are unique and persistent. To ensure that the uniqueness is absolute, the registration of a specific Uniform Resource Name (URN) Namespace Identifier (NID) for use by SCTE is being speified in this document, in full conformance with the NID registration process specified in RFC3406

Namespace ID: scte Registration Information: registration version number: 1 registration date: 2016-03-20 Declared registrant of the namespace: Registering organization Name: Society of Cable Telecommunications Engineers Address: 140 Philips Road, Exton, PA 19341-1318, USA Designated contact Role: Manager, Standards Email: TBD Declaration of syntactic structure: The Namespace Specific String (NSS) of all URNs that use the "scte" NID will have the following structure: urn:scte:{SCTEresource}:{ResourceSpecificString} where the "SCTEresource" is a US-ASCII string that conforms to the URN syntax requirements of . SCTE will maintain a naming authority, the SCTE Assigned Names and Numbers [SANN] specification, that will contain the assignment of SCTE resource classes and the specific registration values assigned for each resource class. This specification will be published on the SCTE Standards Program website. Relevant ancillary documentation: SCTE publishes information regarding the registered resources in the corresponding SCTE standards. Identifier uniqueness considerations: SCTE will manage resource classes using the "scte" NID and will be the authority for managing resources and associated subsequent strings. SCTE is expected to guarantee the uniqueness of the strings themselves. SCTE could allow the use of experimental type values for testing purposes only. Note that using experimental types may create collisions as multiple users may use the same values for resources and specific strings. Identifier persistence considerations: SCTE will update the SCTE Assigned Names and Numbers specification to document the registered resources that use the "scte" NID. Process of identifier assignment: SCTE will provide procedures for registration of each type of resource that it maintains. Each such resource may have three types registration activities: Registered values associated with SCTE documents or services Registration of values or sub-trees to other entities Name models for use in experimental purposes Process of identifier resolution: The namespace is not listed with a resolution discovery system; this is not applicable for this URN registration. Rules for lexical equivalence: No special considerations; the rules for lexical equivalence of apply. Validation mechanism: None specified. URN assignment will be handled by procedures implemented in support of SCTE activities. Scope: Global

The following example represents a hypothetical URL that could be assigned by SCTE. urn:scte:dash:2015 This example defines the URN to be used for for ANSI/SCTE 214-1 2015 “MPEG DASH for IP-Based Cable Services Part 1: MPD Constraints and Extensions”

SCTE develops specifications that may require the use of data models. URN Namespaces are key constructs to manage the definitions of those data models reliably with persistence and uniqueness. The use of URNs should also help specification authors to maintain different versions of URNs and dependencies between URNs across different versions of SCTE specifications if they so wish.

Participants involved in the development and usage of SCTE specifications and cable industry deployments will benefit from the publication of this namespace by providing consistent and reliable names for the XML namespaces, schema locations, and similar identifiers of physical data models published within SCTE specifications. The SCTE specifications are publicly available and are licensed to manufacturers on a nondiscriminatory basis. SCTE will maintain the corresponding specifications where the registered resources are referenced or used.

This document adds a new entry ("scte") in the urn-namespaces registry. This is the defining document for the entry. The entry can be found in the Uniform Resource Names (URN) Namespaces Registry.

There are no additional security considerations other than those normally associated with the use and resolution of URNs in general, which are described in , ,

The authors acknowledge that the text from formed the basis for the initial version of this document.