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Documentation
Written for two readers: someone who wants to build and run the engine, and someone who wants to teach with it. Every page carries the evidence tier of what it describes.
Getting started
Build the engine, open a table, and run your first ordered read.
Command families
The whole shell surface, grouped by the job it does.
Engine architecture
Libraries, seams, and why the front end never owns the truth.
Storage formats
DBF_64 and FPT64: headers, geometry, 64-bit memo identifiers.
Indexing
CDX, CNX, INX, the LMDB key store, and cross-generation attachment policy.
Query and relations
The house SELECT, its SQLite oracle, and two ways to walk one graph.
Script mode
Command files, variables, conditionals, loops, and scans.
Teaching material
Labs that make a layer visible instead of describing it.
Ecosystem context
Where x64base sits beside Harbour, Xbase++, XSharp, and dBASE tools.