This is a list of XML schemas in use on the Internet sorted by purpose. XML schemas can be used to create XML documents for a wide range of uses such as syndication, general exchange, and storage of data in a standard format.

Bookmarks

XBEL - XML Bookmark Exchange Language

Business

UBL - Defining a common XML library of business documents (purchase orders, invoices, etc.) by Oasis

ARTSXML - Retail XML schema specification by Association for Retail Technology Standards

Graphical User Interfaces

GLADE - GNOME's User Interface Language (GTK+)

KParts - KDE's User Interface Language (Qt)

XUL - XML User Interface Language (Native)

XAML - Microsoft's Extensible Application Markup Language

Mathematical

MathML - Mathematical Markup Language

Metadata

RDF - Resource Description Framework

ONIX - ONline Information eXchange

Music Playlists

XSPF - XML Shareable Playlist Format

News Syndication

Atom - Atom

RSS - Really Simple Syndication

Paper and Forest Products

papiNet - XML format for exchange of business documents and product information in the paper and forest products industries.

Statistics

SDMX - SDMX-ML is a format for eXchange and sharing of Statistical Data and Metadata.

Vector Images

SVG - Scalable Vector Graphics