# XForms 2.0 support

Here at the feature from [XForms 2.0](https://www.w3.org/community/xformsusers/wiki/XForms_2.0) and its [XPath expression module](https://www.w3.org/community/xformsusers/wiki/XPath_Expressions_Module) that are available as of Orbeon Forms 4.3:

* `xf:var`
* `xf:repeat` over sequences of atomic values and nodes
* deprecation of `nodeset` in favor of `ref`
* multiple MIPs of the same property affecting the same node
* AVTs (Attribute Value Templates)
* `accept` attribute on `xf:upload`
* `xf:property` child of `xf:dispatch` element
* `iterate` attribute on actions
* `xf:valid()` function

XForms 2.0 features added with Orbeon Forms 4.5:

* `xf:bind()` function

XForms 2.0 features added with Orbeon Forms 4.8:

* `caseref` attribute on `xf:switch`
  * This allows storing the value of the currently-selected case to instance data.
* `case()` function
  * This function was already available as `xxf:case()` in previous versions.

XForms 2.0 features added with Orbeon Forms 2016.1:

* `xf:submission` and `xf:instance` [JSON support](https://doc.orbeon.com/~/revisions/-LF_uc1WMpa4Sd-n5tDb/submission/standard-support#json-support).
  * This allows receiving `application/json` content. The JSON received is converted to an XML representation friendly to XPath expressions. This allows receiving data from JSON services and using it in your forms, including via Form Builder services.
  * This also allows sending `application/json` content, based on an XML representation.

XForms 2.0 features added with Orbeon Forms 2017.1:

* `nonrelevant` attribute on `<xf:submission>`
  * This deprecates the `relevant` attribute.
  * The values are `keep`, `remove`, and `empty`.

For what remains to be implemented, see the [issues tagged "XForms 2.0"](https://github.com/orbeon/orbeon-forms/issues?direction=desc\&labels=XForms+2.0\&page=1\&sort=updated\&state=open).