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Call for Participation in Declarative Dynamic Extensions to HTML Community Group

The Declarative Dynamic Extensions to HTML Community Group has been launched:

The mission of this group is to write the specification of a set of HTML declarative extensions
that allow :

  • to write factorised HTML (with help of the handlebars template engine), perform some advanced dynamic behaviors (without javascript requirements),
  • and resolve some separation of concerns problems by adding a design layer between styles and the html document itself.

This declarative design layer will provide, by external XML resources (initially called XML Design System Sheets) subset of handlebars templates to describe how user agent have to render the shadow dom of classical HTML elements.
Moreover, the dynamic behaviours will use the data representation separations allowed by integrating model instance elements from XForms to HTML itself. To complete it, an extension will propose a new way to retrieve datas as a form control replacement based on the editor attribute, inspired from XForms specification.

This group will produce reports after discussions, specification(s), and maybe a javascript experimental implementation. One or more of this skills and expertise are desired from participants : HTML, XML, Javascript, and an attention to the importance of the javascript unobstrusive recommendation (declarative HTML should be full functionnal , security reasons, stability…).

This group may publish Specifications.

In order to join the group, you will need a W3C account. Please note, however, that W3C Membership is not required to join a Community Group.

This is a community initiative. This group was originally proposed on 2023-03-07 by Guillon Flavien. The following people supported its creation: Guillon Flavien, Kristina Gudim, Jean Belicot, Fabien Stéfaniak, Haerul Fuad. W3C’s hosting of this group does not imply endorsement of the activities.

The group must now choose a chair. Read more about how to get started in a new group and good practice for running a group.

We invite you to share news of this new group in social media and other channels.

If you believe that there is an issue with this group that requires the attention of the W3C staff, please email us at

Thank you,
W3C Community Development Team

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