XMLt

XMLt is an XML-based templating language designed to describe how to generate XML or plain-text outputs from data inputs. It defines templates that can be parameterized and composed, enabling separation of data from its presentation. The language focuses on declarative template definitions rather than imperative code, and it relies on an XML-compatible syntax so existing XML tools can parse the templates.

A central feature is the template element, which declares a named template and its parameters. Within a template, content may include placeholders for data values and control structures such as conditionals and loops, expressed with elements like if, for-each, and choose. Rendering usually involves supplying a data model and invoking a template to produce a concrete document. XMLt processors may render to XML, JSON, or plain text, depending on the output target.

Compared with native XML documents, XMLt adds a templating layer that can be integrated into XML toolchains without changing the underlying data model. It is designed to be compatible with standard XML parsing but requires a dedicated processor to resolve templates and variables.

Common use cases include generating configuration files from a data source, producing standardized documents such as reports, or scaffolding code and boilerplate. Tools and libraries for XMLt, where present, typically offer data binding, template composition, and output serialization.

Example:

<template name="greeting">

<param name="name"/>

<text>Hello, ${name}!</text>

</template>

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