The A Semantic Definition Format for Data and Interactions of Things (asdf) WG in the Applications and Real-Time Area of the IETF is undergoing rechartering. The IESG has not made any determination yet. The following draft charter was submitted, and is provided for informational purposes only. Please send your comments to the IESG mailing list (i...@ietf.org) by 2024-06-03.
A Semantic Definition Format for Data and Interactions of Things (asdf) ----------------------------------------------------------------------- Current status: Active WG Chairs: Michael Richardson <mcr+i...@sandelman.ca> Niklas Widell <niklas.wid...@ericsson.com> Assigned Area Director: Francesca Palombini <francesca.palomb...@ericsson.com> Applications and Real-Time Area Directors: Murray Kucherawy <superu...@gmail.com> Orie Steele <orie@transmute.industries> Mailing list: Address: a...@ietf.org To subscribe: https://www.ietf.org/mailman/listinfo/asdf Archive: https://mailarchive.ietf.org/arch/browse/asdf/ Group page: https://datatracker.ietf.org/group/asdf/ Charter: https://datatracker.ietf.org/doc/charter-ietf-asdf/ ## Background In 2019 One Data Model (OneDM) was started to bring several IoT SDOs and IoT device and platform vendors together under a broad, multi-party liaison agreement, with a goal of arriving at a common set of data and interaction models that describe IoT devices. After some exploratory work this resulted in a successful proposal to create the ASDF WG. As a common language for writing down these models, the Semantic Definition Format went through the IETF process, producing (draft-ietf-asdf-sdf). This SDF Base specification has now reached WG Consensus, to be published. SDF represents these models in JSON, enabling re-use of specification formats such as CDDL (RFC8610) and the formats proposed at json-schema.org and their tooling, for describing both the SDF format itself and the structure of the data to be modelled in SDF. SDF does not deal directly with serialization at all, modeling only the structure and semantics of the data being interchanged, hence leaving data serialization (and RPC semantics) to other standards, most likely defined by existing IoT SDOs. ## The ASDF Working Group The ASDF WG has developed SDF into a standards-track specification for thing interaction and data modeling. In the process of developing this specification, further functional requirements have emerged that can be addressed as extensions to the base SDF specification. The ASDF WG will develop these extensions in consultation with experts from OneDM and its contributing organizations to extend SDF to cover the following: * modeling of links and relationships between elements of models, * modeling of non-affordance attribute (e.g., location) information/interaction for digital twins where the corresponding physical objects can be described with SDF, * additional SDF modeling mechanisms to enable property mapping between additional IoT SDOs' objects (including instances, and types), and * information/interaction modeling and protocol mappings to enable gateway interactions between IP and non-IP transports, with draft-brinckman-nipc-00 as a starting point. To increase ease of use, ASDF WG will also complete work on the proposal for a Compact Notation for SDF. As work evolves, ASDF will observe and may want to interact with IRTF Research Groups such as the Usable Formal Methods Research Group (UFMRG). ASDF will work with Thing-to-Thing Research Group (T2TRG) and its WISHI (Work on IoT Semantic/Hypermedia Interoperability, https://wishi.space) program to engage researchers and other SDOs in this space, such as W3C Web of Things, which is working on Thing Models and related specifications. Milestones: Sep 2024 - Submit to the IESG a standards track extension to SDF to describe sdfTyped links. Nov 2024 - Submit to the IESG a standards track extension to SDF to describe relationships between elements of models (beyond sdfRef). Jan 2025 - Submit to the IESG a standards track document on Compact Notation for SDF. May 2025 - Submit to the IESG a standards track specification on how to use SDF to communicate over IP with non-IP based devices. Aug 2025 - Submit to the IESG a standards track extension which allows for industry specific attributes to be associated with a common SDF model. Aug 2025 - Submit to the IESG a standards track specification on describing instances that are based on SDF models. Sep 2025 - Submit to the IESG a standards track extension to SDF to allow for inclusion of physical information and other non-affordance attribute information/interactions as an SDF attribute (e.g., to provide modeling support for digital twins). _______________________________________________ IETF-Announce mailing list -- ietf-announce@ietf.org To unsubscribe send an email to ietf-announce-le...@ietf.org
