1# Hierarchy references23- [PMI Work Breakdown Structure practice standard](https://www.pmi.org/standards/work-breakdown-structures) — prior art for deliverable-oriented decomposition and the 100-percent rule.4- [Graphviz DOT documentation](https://graphviz.org/documentation/) — supported automatic tree layout.5- [Mermaid flowchart syntax](https://mermaid.js.org/syntax/flowchart.html) — supported hierarchical graph syntax.67Org-chart and taxonomy semantics are conventions rather than one universal interchange standard. Do not claim a generic tree is an ArchiMate or SysML view without implementing that standard.