UConvertDoc

Document Formats Directory

A comprehensive index of structural and fixed-layout document formats for engineering applications.

The distinction between structural formats (like DOCX, EPUB) and fixed-layout formats (like PDF, XPS) is the fundamental dichotomy of document engineering.

Fixed-Layout Architectures

Formats designed to preserve absolute coordinates, typography, and visual fidelity across all rendering contexts.

  • PDF (Portable Document Format): The industry standard. ISO 32000.
  • XPS (XML Paper Specification): Microsoft's fixed-layout format, utilizing XAML.
  • PostScript: The legacy page description language.

Reflowable / Structural Architectures

Formats that separate content from presentation, allowing the rendering engine to calculate layout dynamically.

  • DOCX (Office Open XML): ECMA-376 standard. A zipped collection of XML structures.
  • EPUB (Electronic Publication): W3C standard for reflowable text based on HTML5 and CSS.
  • Markdown: Lightweight markup for semantic structuring.

Frequently Asked Questions

Why is PDF not considered a structural format?

PDF inherently maps glyphs to absolute X/Y coordinates on a page. While Tagged PDF introduces structure, the foundational architecture is paint-to-canvas, not semantic reflow.

What makes DOCX different from legacy DOC?

DOCX is an Open XML standard (essentially a ZIP file of XML and assets), whereas legacy DOC was a proprietary binary format. This makes DOCX parsable by standard XML libraries.