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Thank you,

The Internet Assigned Numbers Authority
iana-mime@iana.org

Name: Randall Armstrong
Email: sysadmin@opcfoundation.org

Media type name: application
Media subtype name: opc-nodeset+xml

Required parameters: None

Optional parameters:
None

Encoding considerations: binary

Security considerations:
The media types are used for the exchange of metadata between industrial applications. Accepting metadata from an untrustworthy source could have many serious consequences. Therefore all consumers of this media type shall not accept files from an untrusted or unverifiable origin.

The media format itself allows for recursive operations that could be a vector for denial service attacks. All consumers shall have protections to protect against infinite recursive loops.

Interoperability considerations:
All three data formats are completely specified in IEC 62541-6. This specification provides a common representation to ensure interoperability across all platforms.

(see https://webstore.iec.ch/publication/61115).

Published specification:
IEC 62541-6
https://webstore.iec.ch/publication/61115

An online version maintained by the OPC Foundation is found here:
https://reference.opcfoundation.org/v104/Core/docs/Part6/

The published XML schema for the XML version is found here:
https://opcfoundation.org/UA/2011/03/UANodeSet.xsd

Applications which use this media:
Industrial automation applications which exchange metadata that describes the components of automation systems.

Fragment identifier considerations:
None

Restrictions on usage:
None

Provisional registration? (standards tree only):
None

Additional information:

1. Deprecated alias names for this type: None 2. Magic number(s): None 3. File extension(s): None 4. Macintosh file type code: None 5. Object Identifiers: None

General Comments:
It is not clear if we should be asking for something in the vnd tree.

We expect to additional mime types with different encodings (json, binary). It is not clear if a separate application needs to be provided for each.

Person to contact for further information:

1. Name: OPC Foundation
2. Email: sysadmin@opcfoundation.org

Intended usage: Common
No restrictions on the use are required.

Author/Change controller: OPC Foundation/OPC UA Working Group Chair

https://www.iana.org/assignments/provisional-standard-media-types/provisional-standard-media-types.xhtml

Thanks. Did they give any indication of when it would be official?

The mime type "application/opc-nodeset+xml" has been assigned by IANA:

https://www.iana.org/assignments/media-types/application/opc-nodeset+xml

Agreed to add reference to the new mime type to Part 6.

Added A.4 MIME Types

Agreed to changes in 1.05.01 Draft 4.