"""Source registry for Polish DynaWord. Each entry = one openly-licensed, *traceable* human-text source (paper 2508.02271, principle: open+traceable licensing). The `traceable` field documents WHY the license holds (not just "it's public domain") — e.g. statutory basis or upstream license — as required by the Dynaword guidelines. Provenance note: data is pulled from SpeakLeash's public redistribution (iDrive e2 bucket) of these upstream sources; SpeakLeash is credited as the intermediate aggregator, upstream license/attribution is preserved per source. """ # clean-6: passed the copyright review (2026-06-15). open_subtitles excluded # (derivative of copyrighted film dialogue — same lesson as Danish Gigaword). # Large cultural/academic sources require per-record rights metadata and should # be rebuilt from direct upstream/export scripts rather than blind SpeakLeash pulls. SOURCES = { "edukacja_medialna_pl": { "file_key": "edukacja_medialna_pl", "pretty": "Edukacja Medialna - Polish media-literacy lessons", "provenance": "Pinned PiotrSty/edukacja-medialna-pl snapshot acquired " "directly from Fundacja Nowoczesna Polska lesson pages " "and source XML.", "license": "CC-BY-SA-3.0", "license_spdx": "CC-BY-SA-3.0", "traceable": "Direct official lesson XML plus the per-lesson license " "line on edukacjamedialna.edu.pl. Each accepted record " "has explicit CC BY-SA 3.0 evidence and credited " "text/scenario authors in the source metadata.", "upstream": "https://edukacjamedialna.edu.pl/lekcje/", "domain": "educational/media-literacy/instructional", "created": "2012-11-09, 2015-01-12", "is_ocr": False, "custom_datasheet": True, "added": "2026-09-06", "release": None, }, "plwiki_user_talk": { "added": "2026-09-11", "release": None, "file_key": "plwiki_user_talk", "pretty": "Polish Wikipedia user-talk pages (ns 3)", "license": "CC BY-SA 4.0", "license_spdx": "CC-BY-SA-4.0", "traceable": "Records come from the pinned official Wikimedia pages-meta-current dump (sha1-verified shards). Per-record page id, title, namespace, last-revision timestamp and canonical URL are preserved; page history carries contributor attribution per Wikimedia Terms of Use section 7.", "upstream": "https://pl.wikipedia.org/", "provenance": "Rebuilt deterministically from the Wikimedia XML dump. Scope is namespace 3 (user talk) only; mainspace (ns=0) is covered by the existing wikipedia shard and article/project talk (ns=1,5) ships as the separate plwiki_talk slice. Wikitext stripped with mwparserfromhell, cross-document boilerplate lines removed, normalized, PII patterns redacted (email, labelled phone, IPv4, parsed IPv6 including compressed notation, labelled PESEL/NIP/REGON, 26-digit account candidates), language/quality filtered and within-source deduplicated. Pattern redaction is not complete anonymization.", "domain": "conversational/editor-to-editor-messages", "created": "2002-2026", "is_ocr": False, "custom_datasheet": True, }, "nonsa": { "added": "2026-09-29", "release": None, "file_key": "nonsa", "pretty": "Nonsensopedia (Polish satirical wiki, content namespaces)", "license": "CC BY-SA 3.0", "license_spdx": "CC-BY-SA-3.0", "traceable": "Records come from the pinned wikiteam3 archive.org dump https://archive.org/details/wiki-nonsa.pl-20251009 (sha1-verified). Per-record page id, title, namespace, last-revision timestamp and canonical URL are preserved; page history carries contributor attribution per the site CC BY-SA 3.0 license.", "upstream": "https://nonsa.pl/", "provenance": "Rebuilt deterministically from the wikiteam3 xmlrevisions XML dump; latest revision per page. Scope is content namespaces (0 articles, 100 Cytaty, 102 NonNews, 104 NonZrodla, 106 Slownik, 108 Gra, 110 Forum, 114 Poradnik). Wikitext stripped with mwparserfromhell, cross-document boilerplate lines removed, normalized, PII patterns redacted (email, labelled phone, IPv4, parsed IPv6 including compressed notation, labelled PESEL/NIP/REGON, 26-digit account candidates), language/quality filtered and within-source deduplicated. Pattern redaction is not complete anonymization.", "domain": "humor/satirical-wiki", "created": "2006-2025", "is_ocr": False, "custom_datasheet": True, }, "uzp_orzeczenia_pl": { "added": "2026-09-17", "release": None, "file_key": "uzp_orzeczenia_pl", "pretty": "UZP Orzeczenia - KIO/SO/SA/SN public-procurement rulings", "license": "public-domain (official documents)", "license_spdx": "LicenseRef-Polish-Official-Documents", "traceable": "Every retained ruling links to its /Home/Details landing URL, PDF URL and sha256; organ, document type, signature, issue date, chairman, purchaser and key provisions are kept per record.", "upstream": "https://orzeczenia.uzp.gov.pl/", "provenance": "Enumerated deterministically via the service's kind-filtered /Home/GetResults pagination matching server-reported totals; per-document /Home/Details metadata and /Home/PdfContent PDFs fetched, extracted with pypdf, normalized, PII patterns redacted, language/quality filtered and within-source deduplicated. Polish Copyright Act art. 4(2): official documents are not subject to copyright; UZP search service republishes KIO/SO/SA/SN rulings in public procurement matters.", "domain": "legal/judicial", "created": "2009-2026", "is_ocr": False, "custom_datasheet": True, }, 'rock_pollub_pl': {'added': '2026-09-08', 'file_key': 'rock_pollub_pl', 'pretty': 'ROCK Politechnika Lubelska - Polish academic books', 'license': 'CC-BY-SA-4.0', 'license_spdx': 'CC-BY-SA-4.0', 'traceable': 'Each retained book has CC BY-SA 4.0 evidence in both the item record and ' 'matched original-PDF bitstream metadata; URLs, checksums, attribution and ' 'exclusions are preserved.', 'upstream': 'https://rock.pollub.pl/collections/a42db069-319d-4d51-88d1-490ee7e6bad8', 'provenance': 'Fetched directly from the official ROCK repository by ' 'src/fetch_rock_pollub_pl.py; only the fail-closed eight-record subset with ' 'item- and PDF-level rights evidence is included.', 'domain': 'academic/technical', 'created': '2023-2026', 'is_ocr': False, 'custom_datasheet': True}, "plwiki_talk": { "added": "2026-09-11", "release": None, "file_key": "plwiki_talk", "pretty": "Polish Wikipedia talk pages (ns 1+5)", "license": "CC BY-SA 4.0", "license_spdx": "CC-BY-SA-4.0", "traceable": "Records come from the pinned official Wikimedia pages-meta-current dump (sha1-verified shards). Per-record page id, title, namespace, last-revision timestamp and canonical URL are preserved; page history carries contributor attribution per Wikimedia Terms of Use section 7.", "upstream": "https://pl.wikipedia.org/", "provenance": "Rebuilt deterministically from the Wikimedia XML dump. Scope is namespaces 1 and 5 only; mainspace (ns=0) is covered by the existing wikipedia shard and user-talk (ns=3) is excluded by scope decision (not measured). Wikitext stripped with mwparserfromhell, cross-document boilerplate lines removed, normalized, PII patterns redacted (email, labelled phone, IPv4, parsed IPv6 including compressed notation, labelled PESEL/NIP/REGON, 26-digit account candidates), language/quality filtered and within-source deduplicated. Pattern redaction is not complete anonymization.", "domain": "conversational/community-moderation", "created": "2002-2026", "is_ocr": False, "custom_datasheet": True, }, "wikipedia": { "added": "2026-07-02", "release": "0.2.0", "speakleash_key": "plwiki", "pretty": "Polish Wikipedia", "license": "CC-BY-SA-3.0", "license_spdx": "CC-BY-SA-3.0", "traceable": "Wikimedia dumps explicitly released under CC-BY-SA 3.0; " "attribution to contributors + share-alike preserved.", "upstream": "https://dumps.wikimedia.org/plwiki/latest/", "domain": "encyclopedic", "created": "2001-01-15, 2026-06-14", "is_ocr": False, }, "wikisource": { "added": "2026-07-02", "release": "0.2.0", "speakleash_key": "plwikisource", "pretty": "Polish Wikisource", "license": "CC-BY-SA-3.0", "license_spdx": "CC-BY-SA-3.0", "traceable": "Wikimedia dumps under CC-BY-SA 3.0; underlying texts are " "public-domain works transcribed by the community.", "upstream": "https://dumps.wikimedia.org/plwikisource/latest/", "domain": "books/source-texts", "created": "2005-01-01, 2026-06-14", "is_ocr": False, }, "wiktionary_examples": { "added": "2026-07-19", "release": "0.2.5", "file_key": "wiktionary_examples", "pretty": "Polish Wiktionary usage examples", "provenance": "Parsed directly from the official Wikimedia dump " "(plwiktionary-latest-pages-articles.xml.bz2); not routed " "through SpeakLeash. Usage-example sections of Polish-language " "entries extracted and grouped one document per headword.", "license": "CC-BY-SA-3.0", "license_spdx": "CC-BY-SA-3.0", "traceable": "Wikimedia dumps explicitly released under CC-BY-SA 3.0; " "attribution to contributors + share-alike preserved. " "Derived subset: usage-example sections from Polish-language " "entries only, grouped one document per headword.", "upstream": "https://dumps.wikimedia.org/plwiktionary/latest/", "domain": "lexicographic", "created": "2004-03-22, 2026-08-15", "is_ocr": False, }, "eurlex": { "added": "2026-07-02", "release": "0.2.0", "speakleash_key": "eurlex_corpus", "pretty": "EUR-Lex (EU legal acts, Polish)", "license": "CC-BY-4.0", "license_spdx": "CC-BY-4.0", "traceable": "EU documents reusable under Commission Decision 2011/833/EU; " "normative acts fall outside copyright (PL art. 4 pr. aut.). " "Reuse authorised with source acknowledgement.", "upstream": "https://eur-lex.europa.eu", "domain": "legal", "created": "1952-01-01, 2024-12-31", "is_ocr": False, }, "parliamentary": { "added": "2026-07-02", "release": "0.2.0", "speakleash_key": "PPC_corpus", "pretty": "Polish Parliamentary Corpus (Sejm/Senat)", "license": "public-domain (official documents)", "license_spdx": "CC-BY-4.0", "traceable": "Parliamentary proceedings are official documents outside " "copyright (PL art. 4 pr. aut.); PPC redistributed by IPI PAN " "under CC-BY-4.0.", "upstream": "http://clip.ipipan.waw.pl/PPC", "domain": "political/spoken", "created": "1991-01-01, 2019-12-31", "is_ocr": False, }, "sejm_api_2011_2022": { "added": "2026-08-31", "release": None, "file_key": "sejm_api_2011_2022", "pretty": "Sejm speeches 2011-2022 (terms VII-IX, attributed)", "license": "public-domain (official documents)", "license_spdx": "LicenseRef-Polish-Official-Documents", "traceable": "Official parliamentary materials excluded from copyright under " "Polish Copyright Act art. 4(2); reusable under the Polish Open Data " "Act arts. 2(12), 5, 6, 14(1), 15, 17. 100% speech-level official " "Sejm API URLs preserved in the attribution sidecar.", "upstream": "https://api.sejm.gov.pl/", "provenance": "Converted from the immutable PiotrSty/sejm-speeches-corpus@1245577 " "release (upstream protocol: heuristic PII redaction of e-mail/PESEL/" "phone, <50-word filter, exact dedup). This build applies the date " "window 2011-01-01..2022-12-31, >=200 chars + author, exact dedup. " "NERGAL not run - re-run through SlayerLab/NERGAL before release. " "Shared helpers factored into src/sejm_api_common.py.", "domain": "political/spoken", "created": "2011-11-08, 2022-12-14", "is_ocr": False, "custom_datasheet": True, }, "sejm_api": { "added": "2026-08-22", "custom_datasheet": True, "release": "0.2.5", "file_key": "sejm_api", "pretty": "Sejm API parliamentary speeches (2023 onward)", "license": "public-domain (official documents)", "license_spdx": "LicenseRef-Polish-Official-Documents", "traceable": "Official parliamentary materials excluded from copyright " "under Polish Copyright Act art. 4(2); reusable under " "the Polish Open Data Act arts. 2(12), 5, 14 and 17.", "upstream": "https://api.sejm.gov.pl/", "provenance": "Direct official Sejm API records, preserved with speaker " "attribution and immutable PiotrSty/sejm-speeches-corpus " "v1.0.1 source provenance.", "domain": "political/spoken", "created": "2023-01-01, 2026-07-03", "is_ocr": False, }, "sejm_interpellations": { "added": "2026-07-19", "release": None, "file_key": "sejm_interpellations", "pretty": "Sejm interpellations and written questions (10th term)", "license": "public-domain (official documents)", "license_spdx": "LicenseRef-Polish-Official-Documents", "traceable": "Official parliamentary materials excluded from copyright " "under Polish Copyright Act art. 4(2); reusable under " "the Polish Open Data Act arts. 2(12), 5, 14 and 17.", "upstream": "https://api.sejm.gov.pl/", "provenance": "Fetched from api.sejm.gov.pl HTML body endpoints by " "src/fetch_sejm_interpellations.py (interpellations + " "writtenQuestions, --terms 10). Header chrome stripped into " "meta; attachment-only and keyless replies skipped; " "pre-#38 regex PII scrub only — needs a SlayerLab/NERGAL " "pass before release.", "domain": "political/written", "created": "2023-11-15, 2026-09-03", "is_ocr": False, "custom_datasheet": True, }, "sejm_committee_transcripts": { "added": "2026-09-18", "release": None, "file_key": "sejm_committee_transcripts", "pretty": "Sejm committee transcripts (terms 9-10)", "license": "public-domain (official documents)", "license_spdx": "LicenseRef-Polish-Official-Documents", "traceable": "Official parliamentary materials excluded from copyright " "under Polish Copyright Act art. 4(2); reusable under " "the Polish Open Data Act arts. 2(12), 5, 6, 14, 15, 17. " "Per-record source_url pins the exact api.sejm.gov.pl PDF " "endpoint; content_sha1 fingerprints the transcript body.", "upstream": "https://api.sejm.gov.pl/", "provenance": "Committee 'pelny zapis' PDFs fetched and parsed by " "src/fetch_sejm_committee_transcripts.py (pdftotext -layout, " "page-furniture removal, role-anchored speaker turns, " "soft-hyphenation joining, joint-sitting dedup, PII pattern " "redaction with checksum-validated national IDs). Pattern " "redaction only - re-run through SlayerLab/NERGAL before " "release.", "domain": "political/spoken-committee", "created": "2019-11-14, 2026-09-03", "is_ocr": False, "custom_datasheet": True, }, "parlamint_pl": { "added": "2026-07-19", "release": None, "file_key": "parlamint_pl", "pretty": "ParlaMint-PL (parliamentary debates, 2015-2022)", "license": "CC-BY-4.0", "license_spdx": "CC-BY-4.0", "traceable": "ParlaMint 3.0 corpora released under CC-BY 4.0 (CLARIN.SI " "handle 11356/1486); parliamentary proceedings are also " "official documents (PL art. 4 pr. aut.).", "upstream": "http://hdl.handle.net/11356/1486", "provenance": "Fetched directly from the CLARIN.SI plain-text edition " "(ParlaMint-PL.tgz) by src/fetch_parlamint.py; one session " "transcript per document, utterance IDs stripped. Modern " "spoken register, complements the older PPC (1991-2019).", "domain": "political/spoken", "created": "2015-01-01, 2022-12-31", "is_ocr": False, }, "wolne_lektury": { "added": "2026-07-02", "release": "0.2.0", "speakleash_key": "wolne_lektury_corpus", "pretty": "Wolne Lektury (school readings)", "license": "CC-BY-SA-4.0 / Wolna Sztuka 1.3", "license_spdx": "CC-BY-SA-4.0", "traceable": "Wolne Lektury publishes under CC-BY-SA 4.0 or Free Art " "License; texts are public-domain classics + cleared works.", "upstream": "https://wolnelektury.pl/api/books/", "domain": "literature", "created": "1500-01-01, 2024-12-31", "is_ocr": False, }, "wikinews": { "added": "2026-07-02", "release": "0.2.0", "file_key": "plwikinews", # fetched from Wikimedia dumps, NOT via SpeakLeash "pretty": "Polish Wikinews", "license": "CC-BY-2.5", "license_spdx": "CC-BY-2.5", "traceable": "Wikinews content is released under CC-BY 2.5; attribution to " "contributors preserved.", "upstream": "https://pl.wikinews.org/", "provenance": "Fetched directly from the official Wikimedia dump " "(plwikinews-latest-pages-articles) by src/fetch_wikimedia.py; " "mainspace only, wikitext stripped via mwparserfromhell.", "domain": "news", "created": "2005-01-01, 2025-12-31", "is_ocr": False, }, "wikivoyage": { "added": "2026-07-02", "release": "0.2.0", "file_key": "plwikivoyage", "pretty": "Polish Wikivoyage (travel guides)", "license": "CC-BY-SA-3.0", "license_spdx": "CC-BY-SA-3.0", "traceable": "Wikivoyage content is released under CC-BY-SA 3.0; " "attribution + share-alike preserved.", "upstream": "https://pl.wikivoyage.org/", "provenance": "Fetched directly from the official Wikimedia dump " "(plwikivoyage-latest-pages-articles) by src/fetch_wikimedia.py; " "mainspace only, wikitext stripped via mwparserfromhell.", "domain": "travel", "created": "2012-01-01, 2025-12-31", "is_ocr": False, }, "wikibooks": { "added": "2026-07-02", "release": "0.2.0", "file_key": "plwikibooks", "pretty": "Polish Wikibooks (open textbooks)", "license": "CC-BY-SA-3.0", "license_spdx": "CC-BY-SA-3.0", "traceable": "Wikibooks content is released under CC-BY-SA 3.0; " "attribution + share-alike preserved.", "upstream": "https://pl.wikibooks.org/", "provenance": "Fetched directly from the official Wikimedia dump " "(plwikibooks-latest-pages-articles) by src/fetch_wikimedia.py; " "mainspace only, wikitext stripped via mwparserfromhell.", "domain": "instructional", "created": "2004-01-01, 2025-12-31", "is_ocr": False, }, "wikiquote": { "added": "2026-07-02", "release": "0.2.0", "file_key": "plwikiquote", "pretty": "Polish Wikiquote (quotations)", "license": "CC-BY-SA-3.0", "license_spdx": "CC-BY-SA-3.0", "traceable": "Wikiquote content is released under CC-BY-SA 3.0; " "attribution + share-alike preserved.", "upstream": "https://pl.wikiquote.org/", "provenance": "Fetched directly from the official Wikimedia dump " "(plwikiquote-latest-pages-articles) by src/fetch_wikimedia.py; " "mainspace only, wikitext stripped via mwparserfromhell.", "domain": "quotations", "created": "2005-01-01, 2025-12-31", "is_ocr": False, }, "open_agh_chemistry_pl": { "added": "2026-09-05", "release": None, "file_key": "open_agh_chemistry_pl", "pretty": "Open AGH - four Polish chemistry textbooks", "license": "CC-BY-SA-4.0", "license_spdx": "CC-BY-SA-4.0", "traceable": "Each contributed Polish edition includes explicit CC BY-SA 4.0 terms in its " "preserved official EPUB rights page. Authors, AGH attribution, original URLs " "and changes are preserved.", "upstream": "https://epodreczniki.open.agh.edu.pl", "provenance": "Pinned PiotrSty/open-agh-chemistry-pl source snapshot; public AGH module " "previews with observed revision identifiers and per-module author attribution. " "Pattern PII redaction only - re-run through SlayerLab/NERGAL before release.", "domain": "educational/chemistry/materials", "created": "2018-2024 (book publication metadata proxy)", "is_ocr": False, "custom_datasheet": True, }, "eltec_pol": { "added": "2026-07-02", "release": "0.2.0", "file_key": "eltec_pol", "pretty": "ELTeC-pol (European Literary Text Collection, Polish)", "license": "CC-BY-4.0", "license_spdx": "CC-BY-4.0", "traceable": "ELTeC corpora are released under CC-BY 4.0 by the COST Action " "'Distant Reading for European Literary History' (CA16204).", "upstream": "https://github.com/COST-ELTeC/ELTeC-pol", "provenance": "Fetched directly from the COST-ELTeC/ELTeC-pol GitHub " "repository (level1 TEI) by src/fetch_eltec.py; reading text " "extracted from TEI
paragraphs.", "domain": "literature", "created": "1840-01-01, 1920-12-31", "is_ocr": False, }, "ted_pl": { "added": "2026-09-08", "release": None, "file_key": "ted_pl", "pretty": "TED Polish public-procurement notices", "license": "TED notice reuse terms", "license_spdx": "LicenseRef-TED-Notice-Reuse", "traceable": "TED legal notice permits commercial and non-commercial reuse of procurement " "notices unless otherwise noted, implementing Commission Decision 2011/833/EU " "on the reuse of Commission documents (CELEX:32011D0833); official Search API/XML " "provenance and SHA-256 are preserved per record. Metadata is CC0, while notice " "text uses the separate reuse grant.", "upstream": "https://ted.europa.eu/", "provenance": "Pinned PiotrSty/ted-polish-procurement-notices snapshot; PleIAs/TEDEUTenders " "is used only as a pinned identifier index, while text is rebuilt from official " "TED Search API narrative fields with official XML fallback. Pattern PII " "redaction only - re-run through SlayerLab/NERGAL before release.", "domain": "public procurement / institutional / technical", "created": "2023-02-15, 2024-05-15", "is_ocr": False, "custom_datasheet": True, }, "dziennik_ustaw": { "added": "2026-07-02", "release": "0.2.0", "file_key": "dziennik_ustaw", # fetched directly, NOT via SpeakLeash "pretty": "Dziennik Ustaw + Monitor Polski (Polish primary legislation)", "license": "public-domain (official documents)", "license_spdx": "CC0-1.0", "traceable": "Normative acts and their official drafts are not subject to " "copyright (PL art. 4 ustawy o prawie autorskim). Published by " "the state; reuse unrestricted.", "upstream": "https://api.sejm.gov.pl/eli/acts", "provenance": "Fetched directly from the Sejm ELI API (text.html per act) " "by src/fetch_eli.py — a native source, not redistributed via " "SpeakLeash. Full provenance: each act's `meta.url` is its ELI " "address, resolvable on api.sejm.gov.pl.", "domain": "legal", "created": "1918-01-01, 2025-12-31", "is_ocr": False, }, "govpl": { "added": "2026-07-19", "release": "0.2.2", "file_key": "govpl", # fetched directly from gov.pl, NOT via SpeakLeash "pretty": "gov.pl — Polish government press releases", "license": "CC-BY-SA-4.0", "license_spdx": "CC-BY-SA-4.0", "traceable": "All textual content on gov.pl is published under CC-BY-SA " "4.0 (site footer: \"Treści tekstowe publikowane w serwisie " "… są udostępniane na licencji CC BY-SA 4.0\"). Authored and " "hosted by the Polish government, which holds the right to " "license it — same open family as Polish Wikipedia.", "upstream": "https://www.gov.pl/", "provenance": "Ministry/agency press releases fetched directly from gov.pl " "(editor-content per article, HTML stripped) by " "src/fetch_govpl.py. Subsites + their non-uniform news-section " "paths are enumerated by src/discover_govpl.py into the " "committed manifest src/govpl_subsites.json (gov.pl has no " "sitemap/API). Each record's meta.url resolves on gov.pl.", "domain": "government", # actual min/max of article dates in the fetched corpus (90,124 dated). "created": "2005-09-26, 2026-07-19", "is_ocr": False, }, "samorzad_gov_pl": { "added": "2026-08-14", "release": "0.2.5", "file_key": "samorzad_gov_pl", "pretty": "samorzad.gov.pl — Polish public-sector institutions", "license": "CC-BY-SA-4.0", "license_spdx": "CC-BY-SA-4.0", "traceable": "The shared samorzad.gov.pl platform footer publishes textual " "content under CC BY-SA 4.0. The v0.2 source release is a " "de-identified subset of the audited v0.1 pages, all of which " "referenced the shared footer script; audiovisual media and " "attachment bytes are not redistributed.", "upstream": "https://huggingface.co/datasets/dawidmajewski/samorzad-gov-pl-articles", "provenance": "Converted reproducibly from the published, de-identified v0.2 " "source dataset by src/clean_samorzad_gov_pl.py. The source was collected " "directly from public samorzad.gov.pl pages across 246 local " "public institutions and one central platform tenant. " "Institution display names are frozen " "from each tenant homepage's og:site_name metadata and stored " "as DynaWord author values; discovered, fetched and attribution " "URLs plus license details are preserved in the sidecar.", "domain": "local government, education, social services and culture", "created": "2020-2026 for 21,892 dated records; 59,530 source records undated", "is_ocr": False, "custom_datasheet": True, }, "openstax_pl": { "added": "2026-09-05", "release": None, "file_key": "openstax_pl", "pretty": "OpenStax Poland - eight academic textbook volumes", "license": "CC-BY-4.0", "license_spdx": "CC-BY-4.0", "traceable": "Each Polish edition explicitly grants CC BY 4.0 in its recorded foreword " "(per-book license statement linked at the origin: openstax.org/books/