Semantic Versioning Policy¶
Governance policy — instantiates Semantic Drift Monitoring
Assigns each definition a versioned identity, effective date, and compatibility rule so old and new meanings can coexist without breaking each other.
A Semantic Versioning Policy governs how meaning is allowed to change over time by giving every definition a versioned identity and a compatibility contract. Each meaning of a term carries a version label and an effective date, and the policy states, in advance, the rule for when a change is compatible (old readers keep working) versus breaking (old readers must be told). Its defining move is that it makes old and new meanings coexist deliberately — rather than replacing a definition, it lets multiple versions run in parallel under stated rules about which is authoritative where. It is not the record of what changed (a change log looks backward at history); it is the forward-facing contract that lets a living vocabulary evolve without silently breaking everything downstream that relied on the old sense.
Example¶
A logistics standards body maintains the code vocabulary that shippers, carriers, and customs systems all read. The status code HELD originally meant "physically detained at a facility." Practice has evolved: many carriers now also use HELD for shipments paused administratively but still moving. Rewriting the definition outright would silently break years of automated customs rules keyed to the physical sense. The versioning policy handles it by rule. It classifies the change as breaking — it alters what downstream systems can assume — so the meaning gets a new version: HELD v2 ("detained OR administratively paused"), effective next release, while v1 remains the authoritative reading for records stamped before that date. A compatibility note spells out the contract: systems consuming pre-effective-date records must interpret HELD as v1; systems on the new release may see either and should check the version tag. Old customs rules keep resolving correctly against historical shipments; new integrations get the broader sense. The two meanings coexist, each pinned to a version and a date, neither breaking the other.
How it works¶
- Version each meaning. Attach a version label and effective date to every definition, so a term's meaning is always addressable as "which version, as of when."
- Classify the change by compatibility. Apply a stated rule — is this change compatible (extends without breaking prior readers) or breaking (changes what prior readers assumed)? The classification, not the author's mood, decides how the change is released.[n1]
- Publish a compatibility contract. State how consumers of old and new versions should interpret each, including which version governs which records or date ranges.
- Let versions coexist under the rule. Rather than overwrite, keep prior versions authoritative for their era, so legacy material and current work each resolve against the right meaning.
Tuning parameters¶
- Compatibility strictness — how readily a change is deemed "breaking"; a strict policy forces more versioning and protects downstream readers but multiplies coexisting versions, a lax one keeps the vocabulary small but risks silent breakage.
- Version granularity — whether every nuance gets its own version or only material shifts do; fine granularity gives precise pinning but a sprawl of versions, coarse granularity is simple but blurs distinctions.
- Deprecation horizon — how long a superseded version stays authoritative before retirement; long horizons protect legacy readers but sustain complexity, short ones simplify but strand old material.
- Scope of coverage — which terms fall under versioning at all; covering everything is consistent but heavy, covering only interoperated terms is lean but leaves informal vocabulary ungoverned.
When it helps, and when it misleads¶
Its strength is evolution without breakage: it is the mechanism that lets a term legitimately change while old contracts, records, and integrations keyed to the prior meaning keep resolving correctly — the direct guard against retroactive misreading in interoperable systems. Its failure mode is version proliferation: too strict a policy, or too fine a granularity, buries the vocabulary under aliases, deprecation notes, and coexisting versions until the compatibility machinery costs more than the drift it manages. A classic misuse is versioning informal, low-stakes language that would be better served by a plain edit. The guarding discipline is to reserve full versioning for meanings that are actually depended upon across systems or time, and to set a real deprecation horizon so old versions retire rather than accumulate forever.
How it implements the components¶
legacy_compatibility_note— it publishes the contract stating how old and new versions of a meaning interoperate and which version governs which records, so legacy material stays correctly interpretable.definition_update_rule— it owns the rule that classifies each change as compatible or breaking and thereby decides how the change is released (in-place versus a new version).
It does not keep the append-only drift_governance_owner and baseline_meaning_snapshot history of who changed what and when — that backward-looking ledger is Definition Change Log, the nearest twin: versioning is the forward compatibility contract, the log is the record of the past. It also does not maintain the whitelist of sanctioned local deviations that stand permanently outside the canonical line — that is Usage Exception Registry.
Related¶
- Instantiates: Semantic Drift Monitoring — it is the coexistence contract that lets meaning evolve while preserving legacy interpretability.
- Consumes: Glossary Update Workflow — it assigns versions and compatibility rules to the definitions the workflow produces.
- Sibling mechanisms: Terminology Audit · Corpus / Usage Monitoring · Glossary Update Workflow · Definition Change Log · Policy Language Review · Stakeholder Interpretation Check · Usage Exception Registry
Editorial Notes¶
Form Classification¶
Form family: Rule, Policy & Commitment
Rationale: Semantic Versioning Policy operates as a standing rule, threshold, contractual commitment, or policy constraint governing future conduct because it assigns each definition a versioned identity, effective date, and compatibility rule so old and new meanings can coexist without breaking each other.
Independent corroboration: The frozen evidence defines Semantic Versioning Policy as 'Assigns each definition a versioned identity, effective date, and compatibility rule so old and new meanings can coexist without breaking each other', so its operative form is Rule, Policy & Commitment.
Review outcome: Independent reviewer agreement; high confidence.
Origin Attribution¶
Primary origin: Computer Science & Software Engineering
Origin pattern: Cross-disciplinary synthesis
Present-day reach: Universal
Rationale: Assigning version increments according to compatibility-changing semantics derives from software versioning. SemVer defines major, minor, and patch changes by compatibility, while W3C ontology guidance extends version stewardship to semantic vocabularies.
Related originating lineages:
- Engineering & Design — Engineering design, reliability, and systems-safety practice supplies a parallel or contributing lineage for the mechanism's defining operation: assigns each definition a versioned identity, effective date, and compatibility rule so old and new meanings can coexist without breaking each other.
- Law & Governance — Effective dates and grandfathered meanings manage reliance when official definitions change.
- Library & Information Science — library_information_science contributes retrieval, classification, metadata, findability, and durable stewardship to this mechanism's defining operation—Assigns each definition a versioned identity, effective date, and compatibility rule so old and new meanings can coexist without breaking each other—without displacing the selected primary historical lineage.
- Linguistics & Semiotics — The object being governed is diachronic change in word and category meaning.
- Organizational & Management Science — organizational_management contributes ownership, decision rights, operating routines, and institutional learning to this mechanism's defining operation—Assigns each definition a versioned identity, effective date, and compatibility rule so old and new meanings can coexist without breaking each other—without displacing the selected primary historical lineage.
Review resolution: The blind reviewers disagree on primary lineage (library_information_science versus computer_science). Authoritative or primary research supports computer_science as the best historical origin: Assigning version increments according to compatibility-changing semantics derives from software versioning. SemVer defines major, minor, and patch changes by compatibility, while W3C ontology guidance extends version stewardship to semantic vocabularies. The cited Semantic Versioning Specification; W3C, OWL Web Ontology Language Guide: Versioning directly supports the mechanism's defining operation. All independently supported contributing domains are retained without an arbitrary cap. origin_mode=cross_disciplinary_synthesis records the lineage relationship, while domain_reach=universal records later applicability separately from provenance.
Encyclopedia synthesis: The exact catalogued form synthesizes established practice rather than reproducing a single standard historical label.
Review outcome: Researched adjudication after independent review; high confidence.
Sources consulted:
Notes¶
[n1] Semantic Versioning (SemVer) — a widely used software convention (MAJOR.MINOR.PATCH) in which an incompatible change bumps the major number while backward-compatible changes bump the minor or patch. This policy borrows its central idea for definitions: a breaking meaning change earns a new version and effective date, so consumers can tell compatible evolution from a change that alters what they may assume. ↩