Xerdi's Documentation Project (XDP): Intertwined documents.

This article presents Xerdi's Documentation Project (XDP), a modular framework for scaling and simplifying LATEX-based document production. XDP separates template logic, content, and configuration into structured components, such as Executable Document Templates (EDTs), Document Portfolios, Data Definition Repositories, and Workspaces. Leveraging LATEX features like TEXMFHOME and TEXMFDOTDIR, it enables reusable and extensible document work-flows across teams or clients. Through practical examples, this article demonstrates how intertwined documents can simplify use cases like legal documents, invoices, and academic materials. It highlights how XDP tackles challenges such as responsive branding, agile development, and user-friendly input for minimal coding authors. The framework incorporates tools such as bib2-gls [9], attachfile2 [5], and zref [6] to automate complex workflows and improve document scalability. Readers will gain actionable insights and practical tools to better structure and manage their LATEX projects efficiently and collaboratively. [ABSTRACT FROM AUTHOR]