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Third-Party Licenses

LongParser core is licensed under the MIT License.

Some optional backends and integrations use different licenses. These packages are never loaded by default — they are only imported when you explicitly install them and select them in your configuration.

Optional Backend Licenses

Package License Install Command When Loaded
pymupdf4llm AGPL-3.0 or Artifex Commercial pip install "longparser[pymupdf]" Only when you set backend="pymupdf"
marker-pdf GPL-3.0-or-later pip install "longparser[marker]" Only when you set backend="marker" (future)
surya-ocr GPL-3.0-or-later pip install "longparser[surya]" Only when explicitly imported (future)

Core Dependency Licenses (always installed)

Package License Purpose
pydantic MIT Schema validation
docling MIT Default PDF extraction engine
docling-core MIT Docling data models
fast-langdetect Apache-2.0 Document language detection

What This Means for You

  • If you only use pip install longparser — everything is MIT or Apache-2.0. You can use LongParser in any project (commercial, proprietary, open source).

  • If you install longparser[pymupdf] — the pymupdf4llm library is AGPL-3.0 licensed. You must comply with AGPL terms for the PyMuPDF component, OR purchase a commercial license from Artifex. LongParser core code remains MIT.

  • If you install longparser[marker] (future) — the marker-pdf library is GPL-3.0 licensed. You must comply with GPL terms for the Marker component. LongParser core code remains MIT.

License Isolation Guarantee

LongParser uses lazy imports to ensure GPL/AGPL packages are never loaded unless explicitly requested. The following guarantees hold:

  1. import longparser does NOT import any GPL/AGPL package
  2. from longparser import DocumentPipeline does NOT import any GPL/AGPL package
  3. DocumentPipeline().process_file("doc.pdf") does NOT import any GPL/AGPL package (uses Docling, which is MIT)
  4. GPL/AGPL code is only loaded when you explicitly set backend="pymupdf" or backend="marker" in ProcessingConfig