The XML dev mailing list has been discussing the licensing terms for the patent Since Elliote Rusty Harold made a recommendation of the rejection of the specification. Danielle Veillard, the chair of Xpointer meetings, mentioned that it would be fruitless to chase them all since no progress would be made. However he was sympathetic to the patent itself.An analysis of the situation was made by Tim Bray. He described it as a big problem and made a suggestion that it would be more responsible for the sun to make a declaration that the patent had
Forms are for collecting data, so it's not surprising that the most important concept in XForms is "instance data", an internal representation of the data mapped to the familiar "form controls". Instance data is based on XML and defined in terms of XPath's internal tree representation and processing of XML.
It might seem strange at first to associate XPath and XForms. XPath is best known as the common layer between XSLT and XPointer, not as a foundation for web forms. As XForms evolved, however, it became apparent that forms needed greater structure
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