# Lineage > **Machine-Evolution Nexus:** [[articles/Digital Darwinism and the Invisible World of Machine Evolution|Digital Darwinism and the Invisible World of Machine Evolution]] places this concept within the history and governance of substrate-independent evolution. **Domain:** Evolution / Provenance / Continuity **Doc Type:** Canonical Wiki Node **Maturity:** Developed ## Definition A lineage is a sequence or branching set of entities connected by descent or derivation. ## Machine-Evolution Context Lineage supplies provenance for biological organisms, digital organisms, software forks and reconstructed persons. It can preserve a causal history through substantial change. ## Continuity and Evidence Boundary Lineage continuity is weaker than numerical identity. Two forks may share an ancestor while becoming distinct continuants with separate claims and obligations. ## Relationships [[wiki/Descent with Modification|Descent with Modification]], [[wiki/Branching Descent|Branching Descent]], [[wiki/Provenance|Provenance]], [[wiki/Forked Continuity|Forked Continuity]] ## Sources / Provenance - Evolutionary systematics; continuity-corpus synthesis.