# DKE > The published documentation for this host, as Markdown. Each link below is > the source text the corresponding HTML page is rendered from; drop the > filename from any URL to reach the page instead. > Every document here is at alpha · API 1.5 · rev 171: one revision for the whole surface, > stated on each document's Version line, which moves whenever any document > changes. Which revisions changed a given document, and how, is in its own > Revision history. > Each document also has a version of its own, given below with the revision it > last changed in; it moves only when that document changes. ## Documentation - [DKE Python — Tutorial](https://dke.langsyn.com/tutorial/dke/python/dke-python-tutorial.md): version 1.1.4, changed in rev 171. DKE Python — a task-ordered tutorial that teaches the DKE Python language by example, from a first program to classes, provenance and modules. Audience: programmers learning to write DKE Python. - [DKE Python — Language Reference](https://dke.langsyn.com/ref/dke/python/dke-python-ref.md): version 13.4.0, changed in rev 171. DKE Python — the language reference: an entry-per-construct lookup of verbs, types, statements, operators, classes and modules. - [DKE Python — Language Specification](https://dke.langsyn.com/spec/dke/python/dke-python-spec.md): version 18.3.8, changed in rev 171. DKE Python — the normative language specification for the DKE Python language, the programs sent to DKE. Audience: programmers writing DKE Python and authors of third-party tooling. - [DKE MCP — Tutorial](https://dke.langsyn.com/tutorial/dke/mcp/dke-mcp-tutorial.md): version 1.0.5, changed in rev 171. DKE MCP — a walkthrough of the connection itself: getting a key, the MCP handshake, your first compile and run, and how to read the response envelope. - [DKE MCP — Wire & Tool Contract](https://dke.langsyn.com/ref/dke/mcp/dke-mcp-ref.md): version 1.2.0, changed in rev 171. DKE MCP — the wire and tool contract for the DKE service at dke.langsyn.net: the MCP tool surface, request shapes, response envelope, error model, and billing. - [DKE Library — Tutorial](https://dke.langsyn.com/tutorial/dke/library/dke-library-tutorial.md): version 1.0.5, changed in rev 171. The DKE Library — how to compile a published reasoning module into your store, load your own facts into it with or without dkepy, ask it questions, and read the limits of what its answers can mean. - [DKE Library — Reference](https://dke.langsyn.com/ref/dke/library/dke-library-ref.md): version 1.0.5, changed in rev 171. The DKE Library — the lookup: the kinds each published reasoning module declares, the fields you write, the fields it derives and the queries you can call, then the public names of dkepy, the package that writes your facts. - [DKE Library — Specification](https://dke.langsyn.com/spec/dke/library/dke-library-spec.md): version 1.0.5, changed in rev 171. The DKE Library — the normative contract for the reasoning modules and the dkepy fact-writing package: the vocabulary they share, what a conformant producer must do, and what is mechanically checked. ## DKE Library - [DKE Library](https://dke.langsyn.com/source/llms.txt): The DKE Library a customer installs and edits: browsable, versioned, and served as plain text. ## Earlier versions - [DKE Python — Tutorial, version 1.1.3](https://dke.langsyn.com/tutorial/dke/python/1.1.3/dke-python-tutorial.md): superseded by version 1.1.4; served as it was published. - [DKE Python — Tutorial, version 1.1.2](https://dke.langsyn.com/tutorial/dke/python/1.1.2/dke-python-tutorial.md): superseded by version 1.1.4; served as it was published. - [DKE Python — Tutorial, version 1.1.1](https://dke.langsyn.com/tutorial/dke/python/1.1.1/dke-python-tutorial.md): superseded by version 1.1.4; served as it was published. - [DKE Python — Tutorial, version 1.0.0](https://dke.langsyn.com/tutorial/dke/python/1.0.0/dke-python-tutorial.md): superseded by version 1.1.4; served as it was published. - [DKE Python — Language Reference, version 13.3.7](https://dke.langsyn.com/ref/dke/python/13.3.7/dke-python-ref.md): superseded by version 13.4.0; served as it was published. - [DKE Python — Language Reference, version 13.2.6](https://dke.langsyn.com/ref/dke/python/13.2.6/dke-python-ref.md): superseded by version 13.4.0; served as it was published. - [DKE Python — Language Reference, version 13.2.4](https://dke.langsyn.com/ref/dke/python/13.2.4/dke-python-ref.md): superseded by version 13.4.0; served as it was published. - [DKE Python — Language Reference, version 13.2.3](https://dke.langsyn.com/ref/dke/python/13.2.3/dke-python-ref.md): superseded by version 13.4.0; served as it was published. - [DKE Python — Language Reference, version 13.2.2](https://dke.langsyn.com/ref/dke/python/13.2.2/dke-python-ref.md): superseded by version 13.4.0; served as it was published. - [DKE Python — Language Reference, version 13.2.1](https://dke.langsyn.com/ref/dke/python/13.2.1/dke-python-ref.md): superseded by version 13.4.0; served as it was published. - [DKE Python — Language Reference, version 13.2.0](https://dke.langsyn.com/ref/dke/python/13.2.0/dke-python-ref.md): superseded by version 13.4.0; served as it was published. - [DKE Python — Language Reference, version 13.1.1](https://dke.langsyn.com/ref/dke/python/13.1.1/dke-python-ref.md): superseded by version 13.4.0; served as it was published. - [DKE Python — Language Reference, version 13.0.0](https://dke.langsyn.com/ref/dke/python/13.0.0/dke-python-ref.md): superseded by version 13.4.0; served as it was published. - [DKE Python — Language Specification, version 18.3.7](https://dke.langsyn.com/spec/dke/python/18.3.7/dke-python-spec.md): superseded by version 18.3.8; served as it was published. - [DKE Python — Language Specification, version 18.2.8](https://dke.langsyn.com/spec/dke/python/18.2.8/dke-python-spec.md): superseded by version 18.3.8; served as it was published. - [DKE Python — Language Specification, version 18.2.6](https://dke.langsyn.com/spec/dke/python/18.2.6/dke-python-spec.md): superseded by version 18.3.8; served as it was published. - [DKE Python — Language Specification, version 18.2.5](https://dke.langsyn.com/spec/dke/python/18.2.5/dke-python-spec.md): superseded by version 18.3.8; served as it was published. - [DKE Python — Language Specification, version 18.2.4](https://dke.langsyn.com/spec/dke/python/18.2.4/dke-python-spec.md): superseded by version 18.3.8; served as it was published. - [DKE Python — Language Specification, version 18.2.3](https://dke.langsyn.com/spec/dke/python/18.2.3/dke-python-spec.md): superseded by version 18.3.8; served as it was published. - [DKE Python — Language Specification, version 18.2.2](https://dke.langsyn.com/spec/dke/python/18.2.2/dke-python-spec.md): superseded by version 18.3.8; served as it was published. - [DKE Python — Language Specification, version 18.2.0](https://dke.langsyn.com/spec/dke/python/18.2.0/dke-python-spec.md): superseded by version 18.3.8; served as it was published. - [DKE Python — Language Specification, version 18.1.1](https://dke.langsyn.com/spec/dke/python/18.1.1/dke-python-spec.md): superseded by version 18.3.8; served as it was published. - [DKE Python — Language Specification, version 18.0.0](https://dke.langsyn.com/spec/dke/python/18.0.0/dke-python-spec.md): superseded by version 18.3.8; served as it was published. - [DKE MCP — Tutorial, version 1.0.4](https://dke.langsyn.com/tutorial/dke/mcp/1.0.4/dke-mcp-tutorial.md): superseded by version 1.0.5; served as it was published. - [DKE MCP — Tutorial, version 1.0.3](https://dke.langsyn.com/tutorial/dke/mcp/1.0.3/dke-mcp-tutorial.md): superseded by version 1.0.5; served as it was published. - [DKE MCP — Tutorial, version 1.0.2](https://dke.langsyn.com/tutorial/dke/mcp/1.0.2/dke-mcp-tutorial.md): superseded by version 1.0.5; served as it was published. - [DKE MCP — Tutorial, version 1.0.0](https://dke.langsyn.com/tutorial/dke/mcp/1.0.0/dke-mcp-tutorial.md): superseded by version 1.0.5; served as it was published. - [DKE MCP — Wire & Tool Contract, version 1.1.2](https://dke.langsyn.com/ref/dke/mcp/1.1.2/dke-mcp-ref.md): superseded by version 1.2.0; served as it was published. - [DKE MCP — Wire & Tool Contract, version 1.1.1](https://dke.langsyn.com/ref/dke/mcp/1.1.1/dke-mcp-ref.md): superseded by version 1.2.0; served as it was published. - [DKE MCP — Wire & Tool Contract, version 1.1.0](https://dke.langsyn.com/ref/dke/mcp/1.1.0/dke-mcp-ref.md): superseded by version 1.2.0; served as it was published. - [DKE MCP — Wire & Tool Contract, version 1.0.0](https://dke.langsyn.com/ref/dke/mcp/1.0.0/dke-mcp-ref.md): superseded by version 1.2.0; served as it was published. - [DKE Library — Tutorial, version 1.0.4](https://dke.langsyn.com/tutorial/dke/library/1.0.4/dke-library-tutorial.md): superseded by version 1.0.5; served as it was published. - [DKE Library — Tutorial, version 1.0.3](https://dke.langsyn.com/tutorial/dke/library/1.0.3/dke-library-tutorial.md): superseded by version 1.0.5; served as it was published. - [DKE Library — Tutorial, version 1.0.2](https://dke.langsyn.com/tutorial/dke/library/1.0.2/dke-library-tutorial.md): superseded by version 1.0.5; served as it was published. - [DKE Library — Tutorial, version 1.0.0](https://dke.langsyn.com/tutorial/dke/library/1.0.0/dke-library-tutorial.md): superseded by version 1.0.5; served as it was published. - [DKE Library — Reference, version 1.0.4](https://dke.langsyn.com/ref/dke/library/1.0.4/dke-library-ref.md): superseded by version 1.0.5; served as it was published. - [DKE Library — Reference, version 1.0.3](https://dke.langsyn.com/ref/dke/library/1.0.3/dke-library-ref.md): superseded by version 1.0.5; served as it was published. - [DKE Library — Reference, version 1.0.2](https://dke.langsyn.com/ref/dke/library/1.0.2/dke-library-ref.md): superseded by version 1.0.5; served as it was published. - [DKE Library — Reference, version 1.0.0](https://dke.langsyn.com/ref/dke/library/1.0.0/dke-library-ref.md): superseded by version 1.0.5; served as it was published. - [DKE Library — Specification, version 1.0.4](https://dke.langsyn.com/spec/dke/library/1.0.4/dke-library-spec.md): superseded by version 1.0.5; served as it was published. - [DKE Library — Specification, version 1.0.3](https://dke.langsyn.com/spec/dke/library/1.0.3/dke-library-spec.md): superseded by version 1.0.5; served as it was published. - [DKE Library — Specification, version 1.0.2](https://dke.langsyn.com/spec/dke/library/1.0.2/dke-library-spec.md): superseded by version 1.0.5; served as it was published. - [DKE Library — Specification, version 1.0.0](https://dke.langsyn.com/spec/dke/library/1.0.0/dke-library-spec.md): superseded by version 1.0.5; served as it was published. ## Optional - [Sitemap](https://dke.langsyn.com/sitemap.xml): every page this site serves, including the HTML pages the documents above are rendered into. Every LangSyn host, each with an index of its own, is listed at https://langsyn.com/llms.txt.