> ## Documentation Index > Fetch the complete documentation index at: https://aletyx.ai/docs/llms.txt > Use this file to discover all available pages before exploring further. # Reference > Technical reference for the Aletyx Enterprise Build of Kogito and Drools - DMN reserved words, select expressions, release notes, plus curated books, blogs, and standards for DMN and BPMN. Detailed technical information and specifications for the Aletyx Enterprise Build of Kogito and Drools. ## DMN reference * [Reserved Words](/docs/reference/dmn/reserved-words) - Complete list of reserved keywords and symbols in DMN FEEL expressions * [Select Expression](/docs/reference/dmn/select-reference) - Guide to using and optimizing DMN select expressions ## Additional resources * [Best Practices](/docs/guides/best-practices) - Recommended approaches for modeling decisions and processes ## Further reading A curated, vendor-neutral reading and viewing list for going deeper on business decision and process modeling. Start with the standards, then pick a book and a hands-on tool to practice with. ### Standards & specifications The authoritative, freely available sources. These are the contracts that DMN-, DRL-, and BPMN-compliant tools (including the [Aletyx Enterprise Build](/docs/tech-stack)) implement. The official Decision Model and Notation standard, including the FEEL expression language and decision table semantics. The official Business Process Model and Notation standard defining process diagram elements and execution semantics. OMG's BPMN portal with the quick-reference poster, examples, and a list of supporting tools. Home of Drools, jBPM, and Kogito — the open source engines for DRL rules, DMN decisions, and BPMN processes. ### Learning DMN Decision Model and Notation is the standard for modeling repeatable business decisions with decision tables, decision requirements diagrams (DRDs), and FEEL. Bruce Silver's book and training — the practical reference for building correct, well-structured DMN models. Bruce Silver and James Taylor's deep-dive book on applying DMN to real business problems end to end. Free articles, examples, and tutorials on DMN, decision tables, and FEEL from a leading DMN tool vendor. Approachable introduction to decision tables and DMN with hands-on examples. Aletyx's own primer on DMN and how it fits alongside DRL and BPMN. Build and test your first decision model interactively. ### Learning BPMN Business Process Model and Notation is the standard for modeling and executing end-to-end business processes that orchestrate tasks, decisions, and people. Bruce Silver's book and training — the definitive guide to clear, executable BPMN. Jakob Freund and Bernd Rücker's pragmatic, example-driven introduction to modeling with BPMN (and DMN). A thorough, free online BPMN reference covering every symbol with examples. Open source BPMN, DMN, and Forms toolkit — render and edit diagrams in the browser. Aletyx's own primer on BPMN and process automation. Model and run your first process interactively. ### Blogs & thought leaders The practitioners shaping the decision and process management discipline. Decision and process automation in practice — DMN, BPMN, Kogito, and enterprise AI from the Aletyx team. Articles on decision management, DMN, and decision-centric design from the co-author of the DMN standard. Long-running blog on BPMN and DMN modeling practice from the author of the Method and Style books. Regular posts on DMN, BPMN, CMMN, and the broader business automation landscape. Process orchestration and automation engineering, with strong BPMN and DMN coverage. Longtime Drools and Kogito architect — insights on rules engines, KIE, and open source business automation. Decision and process automation perspectives on bringing DMN and BPMN to the enterprise. ### Channels & communities Talks, conferences, and communities where the standards are discussed and applied. Annual vendor-neutral conference on decision management and DMN — recorded sessions on YouTube. The leading conference for business analysis, business rules, and decision management. Mailing lists, chat, and contributor resources for Drools, jBPM, and Kogito. Active community Q\&A on BPMN, DMN, and process automation in practice. ## Next steps Processes, decisions, and rules fundamentals. Hands-on walkthroughs for modeling decisions and processes. Concepts, technologies, and how Aletyx fits together. Persona-based paths to learn quickly.