The integrated XML schema/DTD validator 'automatically finds and highlights errors, and provides detailed error messages' making corrections simple and straightforward. Its Sense:X technology - 'an intelligent, XML-aware editing feature' - provides XML sensing, tag completion, and syntax colouring. Stylus Studio XML Editor facilitates 'multiple synchronized XML editing views' including tree, text, and grid. 'Designed to make working with XML documents as easy as possible, Stylus Studio XML Editor includes fully intuitive editing and integrated XML troubleshooting applications. The XML Editor developed by Stylus Studio is a robust program with a wide range of applicable features. Arbortext Editor also comes equipped with highly configurable and customizable tools. Arbortext Editor features real-time validation in a 'familiar, intuitive user interface with common word- processing capabilities, such as change tracking, drag-and-drop and keyboard macros'. With a focus on maintaining industry standards and internal consistency, Arbortext Editor relies on 'rules for content and stylesheets for formatting'. Arbortext Editor creates data that can be reused and repurpose by formatting it in compatible XL and SGML component-base content models. 'PTC Arbortext Editor enables the authoring of structured content with real-time validation'. Scalar is a project of the Alliance for Networking Visual Culture (ANVC). Scalar supports collaborative authorship and reader responses. Scalar is ideal for formatting and publishing 'essay- and book-length works in ways that take advantage of the unique capabilities of digital writing, including nested, recursive, and non-linear formats'. Combining standardization with flexible structure, Scalar is a web authoring tool that integrates and balances a variety of media sources.

Scalar is designed to accommodate 'small to moderate amounts of structured content' that 'need a lightweight platform that encourages improvisation with your data model'. 'Scalar is a free, open source authoring and publishing platform that’s designed to make it easy for authors to write long-form, born-digital scholarship online'.

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