Standards bodies
IANA media type registry
The authoritative list of registered media types, including the application/xml and +xml conventions this whole site depends on.
IANA publishes every registry it maintains as XML, and this is the one that decides what a media type means. If you have ever wondered whether application/rss+xml is registered, the answer is in here.
The registry format is the same across all of IANA's assignments, so a parser written for this one reads the rest.
https://www.iana.org/assignments/media-types/media-types.xml
- Publisher
- IANA
- Host
www.iana.org- Format
- Not one of the formats we document
- Root when listed
- registry (2026-08-18)
- Size when listed
- 591.6 KB
What the last check saw
Fetched and parsed, 591.6 KB.Checked 2026-08-18 16:02 UTC
Structure
- Root element
registry- Detected as
- xml
- Nodes
- 13,426
- Namespaces
http://www.iana.org/assignments
/registry×1/registry/title×1/registry/category×1/registry/updated×1/registry/registration_rule×1/registry/registration_rule/xref×1/registry/expert×1/registry/xref×2/registry/note×3/registry/note/xref×12/registry/registry×11/registry/registry/title×11
Recent checks
- ok2026-08-18 16:02 UTC
- ok2026-08-18 16:01 UTC
Where it reaches
Also in this category
- The XML Schema schemaThe schema for schemas: XSD's own grammar, written in XSD, at the URI every schema document declares as its namespace.
- The sitemaps.org 0.9 schemaThe normative grammar for a sitemap — the one that says changefreq has eight permitted values and priority is capped at 1.0.
- The RFC indexEvery RFC ever published, with authors, dates, status and the obsoletes/updates graph between them — as one XML document.
- CLDR locale data for EnglishHow English formats dates, numbers, currencies and names — the locale data almost every operating system and language runtime is built on.
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