1# Flowchart conventions23ISO 5807:1985 remains published and defines documentation symbols and conventions for data, program, and system flowcharts. Use it as a vocabulary and review aid. A renderer's shape names do not prove conformance.45Reference: [ISO 5807:1985](https://www.iso.org/standard/11955.html).67The standard is not bundled as executable validation in diagram.zip. Treat strict conformance checking as a possible future integration.