Internet Assigned Numbers Authority Semantic Definition Format (SDF) Created 2025-03-27 Last Updated 2025-03-27 Available Formats [IMG] XML [IMG] HTML [IMG] Plain text Registries included below • Quality Names • Quality Name Prefixes • sdfType Values • Feature Names Quality Names Registration Procedure(s) Specification Required Expert(s) Unassigned Reference [RFC-ietf-asdf-sdf-23] Available Formats [IMG] CSV Name Brief Description Reference Change Controller $comment source code comments only, no semantics [RFC-ietf-asdf-sdf-23] IETF const constant value [RFC-ietf-asdf-sdf-23] IETF contentFormat content format [RFC-ietf-asdf-sdf-23] IETF default default value [RFC-ietf-asdf-sdf-23] IETF description long description text [RFC-ietf-asdf-sdf-23] IETF enum sdfChoice limited to text strings [RFC-ietf-asdf-sdf-23] IETF exclusiveMaximum exclusive maximum for a number [RFC-ietf-asdf-sdf-23] IETF exclusiveMinimum exclusive minimum for a number [RFC-ietf-asdf-sdf-23] IETF format specific format for a text string [RFC-ietf-asdf-sdf-23] IETF items items of an array [RFC-ietf-asdf-sdf-23] IETF label short text (no constraints); defaults to key [RFC-ietf-asdf-sdf-23] IETF maxItems maximum number of items in an array [RFC-ietf-asdf-sdf-23] IETF maxLength maximum length for a text string (in characters, i.e., Unicode scalar values) [RFC-ietf-asdf-sdf-23] IETF maximum maximum for a number [RFC-ietf-asdf-sdf-23] IETF minItems minimum number of items in an array [RFC-ietf-asdf-sdf-23] IETF minLength minimum length for a text string (in characters, i.e., Unicode scalar values) [RFC-ietf-asdf-sdf-23] IETF minimum minimum for a number [RFC-ietf-asdf-sdf-23] IETF multipleOf step size of number [RFC-ietf-asdf-sdf-23] IETF nullable boolean: can the item be left out? [RFC-ietf-asdf-sdf-23] IETF observable boolean: can the item be observed? [RFC-ietf-asdf-sdf-23] IETF pattern regular expression pattern for a text string [RFC-ietf-asdf-sdf-23] IETF properties named dataqualities for type="object" [RFC-ietf-asdf-sdf-23] IETF readable boolean: can the item be read? [RFC-ietf-asdf-sdf-23] IETF required which data items are required? [RFC-ietf-asdf-sdf-23] IETF sdfChoice named dataqualities for a choice [RFC-ietf-asdf-sdf-23] IETF sdfData named dataqualities for an independent data type definition [RFC-ietf-asdf-sdf-23] IETF sdfInputData input data to an action [RFC-ietf-asdf-sdf-23] IETF sdfOutputData output data of an action or event (sdfRequired applies here) [RFC-ietf-asdf-sdf-23] IETF sdfRef sdf-pointer to definition being referenced [RFC-ietf-asdf-sdf-23] IETF sdfRequired pointer-list to declarations of required components [RFC-ietf-asdf-sdf-23] IETF sdfRequiredInputData pointer-list to declarations of required input data for an action [RFC-ietf-asdf-sdf-23] IETF sdfType more detailed information about the type of a string [RFC-ietf-asdf-sdf-23] IETF type general category of data type [RFC-ietf-asdf-sdf-23] IETF uniqueItems boolean: do the items of the array need to be all different? [RFC-ietf-asdf-sdf-23] IETF unit engineering unit and scale (per SenML registry) [RFC-ietf-asdf-sdf-23] IETF writable boolean: can the item be written to? [RFC-ietf-asdf-sdf-23] IETF Quality Name Prefixes Registration Procedure(s) Expert Review Expert(s) Unassigned Reference [RFC-ietf-asdf-sdf-23] Prefix Contact Reference No registrations at this time. sdfType Values Registration Procedure(s) Specification Required Expert(s) Unassigned Reference [RFC-ietf-asdf-sdf-23] Available Formats [IMG] CSV Name Description type JSON Representation Reference Change Controller byte-string A sequence of zero or more bytes string base64url without padding [RFC 8949, Section 3.4.5.2] IETF unix-time A point in civil time (note 1) number POSIX time [RFC 8949, Section 3.4.2] IETF Feature Names Registration Procedure(s) Specification Required Expert(s) Unassigned Reference [RFC-ietf-asdf-sdf-23] Name Brief Description Reference Change Controller No registrations at this time. Licensing Terms