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The view describes what controls appear in the form, how they are grouped together, and what data they are bound to. An XForms document can be as simple as a web form (by only specifying the submission element in the model section, and placing the controls in the body), but XForms includes many advanced features.For example, new data can be requested and used to update the form while it is running, much like using XMLHttp Request/AJAX except without scripting.Because XML is a standard, many tools exist that can parse and modify data upon submission. XForms is itself an XML dialect, and therefore can create and be created from other XML documents using XSLT.Using transformations, XForms can be automatically created from XML schemas, and XForms can be converted to XHTML forms.In contrast to the original web forms (originally defined in HTML), the creators of XForms have used a model–view–controller (MVC) approach.
XForms was designed to be the next generation of HTML / XHTML forms, but is generic enough that it can also be used in a standalone manner or with presentation languages other than XHTML to describe a user interface and a set of common data manipulation tasks.
XForms 1.0 (Third Edition) was published on 29 October 2007.
The original XForms specification became an official W3C Recommendation on 14 October 2003, while XForms 1.1, which introduced a number of improvements, reached the same status on 20 October 2009.
The form author can validate user data against XML Schema data types, require certain data, disable input controls or change sections of the form depending on circumstances, enforce particular relationships between data, input variable length arrays of data, output calculated values derived from form data, prefill entries using an XML document, respond to actions in real time (versus at submission time), and modify the style of each control depending on the device they are displayed on (browser versus mobile versus text only, etc.).
There is often no need for any scripting with languages such as Java Script.
XML Schemas and CSS are outside project scope, however.