pyowl-core
pyowl-core is a Java-free OWL 2 structural kernel for Python 3.10 and newer.
It parses an ontology once and exposes the same immutable view to Exact-OM,
pyELK, pyHermiT, pyOwl2Vec-Star-projector, and OAEI evaluation code. Consumers
build their own reasoning or projection IR; they do not reparse paths or own a
second OWL object model.
Version 0.2.1 is the current release candidate. It preserves API (0, 2),
model schema 2, wire (1, 2), and encoded structural schema 2; adapter
protocol 1 is unchanged. The portable implementation is the compatibility
baseline; native wheels are optional accelerators, but every file for one
package version is built atomically from one source revision. Historical
0.1.x test and performance records are retained as historical evidence and
are not relabelled as 0.2.0 results. Current release decisions and remaining
evidence gates are recorded in the release checklist.
Installation
python -m pip install pyowl-core
The portable wheel provides the complete Python implementation without Java or
a native compiler. Compatible platform wheels may add private Rust
acceleration, but public behavior and values remain identical. Use
BackendPreference.PYTHON for a quiet, explicit portable path or
BackendPreference.NATIVE when acceleration is required and fallback would be
an error.
Quick start
from pyowl_core import (
BackendPreference,
DocumentFormat,
ImportPolicy,
LoadOptions,
load_snapshot,
)
source = b"Ontology(<urn:example> Declaration(Class(<urn:example#A>)))"
snapshot = load_snapshot(
source,
document_iri="urn:example:document",
options=LoadOptions(
format=DocumentFormat.FUNCTIONAL,
imports=ImportPolicy.IGNORE,
backend=BackendPreference.PYTHON,
),
)
assert snapshot.is_complete
assert len(tuple(snapshot.iter_axioms())) == 1
Passing snapshot to another package is an identity-preserving handoff:
coerce_snapshot(snapshot) is snapshot. A provider implements
owl_snapshot() and returns the same OntologyView. Cross-process handoff uses
encode_snapshot, decode_snapshot, or open_snapshot; pickle and ontology
path round-trips are not part of the contract.
What the package owns
- The complete immutable OWL 2 structural model and canonical identity.
- RDF/XML, Turtle, OWL/XML, and Functional Syntax acquisition and rendering.
- Explicit import resolution, provenance, limits, and secure offline defaults.
- Documents, resolved snapshots, persistent overlays, and zero-copy composites.
- Lazy structural indexes, fingerprints, and validated wire/cache transport.
- Equivalent complete Python behavior and optional private Rust acceleration.
It deliberately does not classify, realize, check consistency, project graph edges, repair an ontology, or expose consumer-private IDs. See architecture and view lifecycles.
Release status
The distribution name is pyowl-core; the import package is pyowl_core.
The source tree carries the 0.2.1 production release candidate. Native wheels
are optional optimizations and must never remove features from the pure
fallback. Publication remains fail-closed until the current corpus, native,
consumer, and artifact evidence named in the release ledger is attached. The
1.0 API remains a future compatibility milestone; it is not implied by the
production status of the 0.2 line.
Documentation
- Documentation index
- API guide
- Documents, snapshots, views, overlays, and composites
- Parse-once consumer handoff
- Security, imports, and caches
- Native fallback troubleshooting
- Measured performance evidence
- Version and consumer compatibility
- Migration guide
- Release checklist
- Release, yank, and security rollback
Normative requirements begin at the master specification.
Compatibility boundary
- Distribution:
pyowl-core - Import:
pyowl_core - Python:
>=3.10 - Current package candidate:
0.2.1 - API:
(0, 2); model schema:2; wire:(1, 2); adapter protocol:1 - Encoded structural view:
pyowl-core/structural-columnsschema2 - Runtime/build: no JDK, JRE, JVM, OWLAPI, JPype, ROBOT, Maven, Gradle, or Java archive
- Project source license: Apache License 2.0; packaged third-party notices are
listed in
THIRD_PARTY_LICENSES/
The exact tested consumer commits and ranges are recorded in
reports/integration/consumer-compatibility.json.
Metadata
Release files for pyowl-core 0.2.1
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
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|---|---|---|---|---|
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Built distributions (wheels)
Total release size: 53.7 MB
Release files / pyowl_core-0.2.1.tar.gz
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