Schema-aware XML editing in Vim

Question

When editing an XML file in IntelliJ IDEA, if the document references a schema, IDEA will fetch the schema and use the information for auto-complete. It knows which tags are valid in which contexts, so when you hit CTRL-space, it suggests only those tags. It also highlights any tags that are invalid according to the schema.

Does anybody know of an extension for Vim that provides similar functionality?

Answer 1

VIM 7+ supports that by default without any plugins, it can load XML definition, there are converters for DTD and SchemaNG:

http://vimdoc.sourceforge.net/htmldoc/insert.html#ft-xml-omni

For example my Vim 7.3 already have definitions for XHTML:

$ rpm -ql vim vim-common | grep xml /usr/share/vim/vim73/autoload/xml /usr/share/vim/vim73/autoload/xml/html32.vim /usr/share/vim/vim73/autoload/xml/html401f.vim /usr/share/vim/vim73/autoload/xml/html401s.vim /usr/share/vim/vim73/autoload/xml/html401t.vim /usr/share/vim/vim73/autoload/xml/html40f.vim /usr/share/vim/vim73/autoload/xml/html40s.vim /usr/share/vim/vim73/autoload/xml/html40t.vim /usr/share/vim/vim73/autoload/xml/xhtml10f.vim /usr/share/vim/vim73/autoload/xml/xhtml10s.vim /usr/share/vim/vim73/autoload/xml/xhtml10t.vim /usr/share/vim/vim73/autoload/xml/xhtml11.vim /usr/share/vim/vim73/autoload/xml/xsd.vim /usr/share/vim/vim73/autoload/xml/xsl.vim /usr/share/vim/vim73/autoload/xmlcomplete.vim /usr/share/vim/vim73/compiler/xmllint.vim /usr/share/vim/vim73/compiler/xmlwf.vim /usr/share/vim/vim73/ftplugin/xml.vim /usr/share/vim/vim73/indent/xml.vim /usr/share/vim/vim73/syntax/docbkxml.vim /usr/share/vim/vim73/syntax/xml.vim 

Try it, it's worth it. Everything is documented clearly under the link above, I will not copy-paste it here.

Answer 2

The closest thing that I've seen for Vim is the XML Completion script.

It contains XML definition files for DocBook 4.[234], XSL FO 1.0, XSLT 1.0, Relax NG 1.0, XML Schemas 1.0, SVG 1.1, XHTML 1.1, XInclude 1.0 and OpenOffice 1.0 XML format.