# PDF to Structured Data — third-party attributions

This tool's extraction engine is **OpenDataLoader-PDF**, © Hancom, Inc.,
licensed under the Apache License 2.0. It bundles Apache PDFBox (Apache-2.0)
and veraPDF components, which Hancom distributes under the Mozilla Public
License 2.0 (chosen from veraPDF's dual-licensed options).

- OpenDataLoader-PDF — https://github.com/opendataloader-project/opendataloader-pdf (Apache-2.0)
- Apache PDFBox — https://pdfbox.apache.org/ (Apache-2.0)
- veraPDF — https://verapdf.org/ (MPL-2.0)

Full Apache License 2.0 text: https://www.apache.org/licenses/LICENSE-2.0

Purplelink LLC claims no endorsement by, or affiliation with, any of the
above projects. Uploaded documents are processed in memory and never
retained.