Automated Test Markup Language (ATML): defines a standard exchange medium for sharing information between components of automatic test systems.
Attention.xml: used for RSS and similar online subscription-tracking applications
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BeerXML: a free XML based data description standard for the exchange of brewing data
Binary Format Description language: an extension of XSIL which has added conditionals and the ability to reference files by their stream numbers, rather than by their public URLs
FIXatdl, FIX algorithmic trading definition language. Schema provides a HCI between a human trader, the order entry screen(s), unlimited different algorithmic trading types (called strategies) from a variety of sources, and formats a new order message on the FIX wire.
FIXML, Financial Information eXchange (FIX) protocol in XML format. FIX is a very widely deployed messaging protocol used between financial traders worldwide.
FpML, Financial products Markup Language. Used to describe complex financial products.
FundsXML: an open XML standard for exchanging investment fund data such as fund master data, prices, portfolio holdings and regulatory reporting between asset managers, custodians, distributors, data vendors and supervisors.
FXT: transformation specification for the Functional XML Transformation Tool
GeoSciML: a GML Application Schema that can be used to transfer information about geology, with an emphasis on the "interpreted geology" that is conventionally portrayed on geologic maps.
GJXDM: a data reference model for the exchange of information within the justice and public safety communities
GPX: a language designed for transferring GPS data between software applications
Green Building XML: also known as "gbXML", a schema to facilitate the transfer of building properties stored in 3D building information models (BIM) to engineering analysis tools, especially energy and building performance analysis
General Station Description Markup Language (GSDML): used to describe the communication interface of a Profinet device
HumanML: for describing contextual (emotional, social, pragmatic) information about instances of human communication
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Industry Foundation Classes: specifically the "ifcXML" format, defined by ISO 10303-28 ("STEP-XML"), having file extension ".ifcXML". This format is suitable for interoperability with XML tools and exchanging partial building models.
IO Device Description (IODD): contains information about the device's identity, parameters, process data, diagnosis data and IO-Link communication properties.
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JATS: a vocabulary used for the preparation and publication of scholarly articles.
MusicXML: an XML-based music notation file format.
MXML: a language used to declaratively lay-out the interface of applications, and also to implement complex business logic and rich internet application behaviors
ODD: A 'One Document Does-it-all' TEI format for simultaneously recording project documentation and meta-schema definition from which you can generate RELAX NG, W3C XML Schema, and DTDs as well as formatted documentation.
Office Open XML: is a Microsoft file format specification for the storage of electronic documents
OFX: Open Financial Exchange is a unified specification for the electronic exchange of financial data between financial institutions, businesses and consumers via the Internet.
OIOXML: an XML-markup language created by the Danish government to ease communication from, to and between Danish governmental instances
Open eBook: the e-book format defined by Open eBook Publication Structure Specification; superseded by ePub.
Open Scripture Information Standard (OSIS), an XML-markup schema that defines tags for marking up Bibles, theological commentaries, and other related literature.
OpenDocument (ODF): a document file format used for describing electronic documents
OpenMath – a markup language for mathematical formulae which can complement MathML.
PreTeXt – An authoring and publishing system for authors of textbooks, research articles, and monographs, especially in mathematics and other STEM disciplines.
S1000D: “International specification for technical publications using a common source database”, is an international specification for the production of technical publications.
WaterML: standard information model for the representation of water observations data, with the intent of allowing the exchange of such data sets across information systems.
Web Ontology Language: a language for defining and instantiating Web ontologies (a set of concepts within a domain and the relationships between those concepts)
XDI: sharing, linking, and synchronizing data using machine-readable structured documents that use an RDF vocabulary based on XRI structured identifiers
XidML: an open standard used within the flight test instrumentation industry that describes instrumentation and how data is acquired, stored, transmitted and processed
XInclude: a processing model and syntax for general purpose XML inclusion
XLIFF: XML Localization Interchange File Format, a format created to standardize localization.
XLink: a language used for creating hyperlinks in XML documents
XMI: an OMG standard for exchanging metadata information via XML. The most common use of XMI is as an interchange format for UML models
XML Encryption: a specification that defines how to encrypt the content of an XML element
XML Information Set: describing an abstract data model of an XML document in terms of a set of information items
XML Interface for Network Services: definition and implementation of internet applications, enforcing a specification-oriented approach.
XML Resource: provide a platform independent way of describing windows in a GUI
XML Schema: a description of a type of XML document, typically expressed in terms of constraints on the structure and content of documents of that type, above and beyond the basic syntax constraints imposed by XML itself