README.md

metadata

license: cc-by-sa-4.0
language:
  - el
pretty_name: EELLAK Network Articles
tags:
  - greek
  - open-source
  - open-government
  - open-data
  - open-content
  - creative-commons
  - ellak
  - eellak
  - wordpress
  - blog
size_categories:
  - 1K<n<10K

EELLAK Network Articles - Άρθρα από το δίκτυο ιστοτόπων ΕΕΛ/ΛΑΚ

Dataset Info

This dataset is a structured snapshot of the multi-site WordPress network operated by EELLAK (Εταιρεία Ελεύθερου Λογισμικού / Λογισμικού Ανοιχτού Κώδικα - the Greek Free / Open Source Software Society). EELLAK runs a constellation of 23 thematic subdomains under ellak.gr, each of which acts as a long-running editorial blog dedicated to a specific facet of the open-technology and open-knowledge ecosystem in Greece: open-source software, open government, open data, open educational resources, open standards, open hardware, open content, Creative Commons, data privacy, free public WiFi, open design, and related civic-tech topics.

The dataset contains 7,284 articles spanning 2008-05-12 - 2026-03-19, covering the full editorial output of these sites since the foundation of the EELLAK web network. Each row corresponds to a single WordPress post and includes the article body in Markdown plus the originating site, publication metadata, and authorship information.

The 23 sites covered (and their thematic focus) are:

Subdomain	Articles	Focus
opensource.ellak.gr	1,440	Free / open-source software news
opengov.ellak.gr	816	Open government and civic-tech
edu.ellak.gr	683	Open education in primary / secondary schools
mycontent.ellak.gr	619	Open content and digital publishing
creativecommons.ellak.gr	498	Creative Commons Greece chapter
privacy.ellak.gr	436	Data protection and privacy
opendata.ellak.gr	433	Open public data
eellak.ellak.gr	377	EELLAK organizational news
openstandards.ellak.gr	346	Open standards and interoperability
gfoss.ellak.gr	337	GFOSS general open-source advocacy
openbusiness.ellak.gr	273	Open business models
openhardware.ellak.gr	263	Open hardware
oer.ellak.gr	188	Open educational resources
openwifi.ellak.gr	138	Open / municipal WiFi initiatives
legal.ellak.gr	118	Open-source legal affairs and IP
advisory.ellak.gr	82	Advisory groups and policy work
opendesign.ellak.gr	82	Open design
scientix.ellak.gr	56	Science education (Scientix programme)
odi.ellak.gr	54	Open Data Institute (Greek node)
obs.ellak.gr	32	Observatory / monitoring
mydata.ellak.gr	7	Personal data sovereignty
mathe.ellak.gr	5	Public-awareness mini-site
publicfiscal.ellak.gr	1	Public-finance transparency

The text is in Modern Greek, with occasional English passages (e.g. quoted upstream announcements) and bilingual titles in the opendesign.ellak.gr posts.

Metadata Info

The parquet has one row per article. The schema is:

Column	Type	Description
site	string	Subdomain of ellak.gr where the article was published (one of 23 values).
id	string	WordPress numeric post id, unique within site. The pair (site, id) is the primary key of the dataset.
post_title	string	Article title as published.
post_name	string	URL-encoded slug of the article (the WordPress post_name field; appears in the canonical URL).
post_date	timestamp[us]	Date/time the article was originally published, in Athens local time (Europe/Athens).
post_modified	timestamp[us]	Date/time of the most recent edit, in Athens local time.
post_author	string	WordPress numeric author id of the publishing account (opaque key; usernames are not included).
guid	string	WordPress canonical permalink for the post. See Known Data Quality Notes for cross-posted articles.
content	string	Markdown body of the article. YAML front-matter has been stripped; non-breaking spaces have been normalized.
word_count	int64	Whitespace-separated word count of content.
token_count	int64	Subword token count of content under the nlpaueb/bert-base-greek-uncased-v1 WordPiece tokenizer.

Note on Timestamps

post_date and post_modified are stored as timezone-naive timestamp[us] values, but the wall-clock values represent Athens local time (Europe/Athens - EET in winter, EEST in summer). This matches the local time configured on the source WordPress instances. To work with these timestamps in a timezone-aware way, localize them on read, e.g.:

import pandas as pd
df = pd.read_parquet("eellak.parquet")
df["post_date"] = df["post_date"].dt.tz_localize(
    "Europe/Athens", ambiguous="NaT", nonexistent="shift_forward"
)

Dataset Statistics

• Articles (rows): 7.284
• Sites covered: 23
• Coverage (post_date): 2008-05-12 - 2026-03-19
• Size: 25,10 MB
• Words: 4.255.024 (counted on content, whitespace-separated)
• Tokens: 8.497.146 (counted on content with the nlpaueb/bert-base-greek-uncased-v1 WordPiece tokenizer, no special tokens, no truncation)

The fields included in the word/token count are: content. Identifiers, URLs, slugs, timestamps, titles, and author fields are excluded.

Note on Content Formatting

The content field carries the article body in Markdown, as it was rendered from the original WordPress posts. A few formatting choices are worth noting:

• YAML front matter has been stripped. Each source .md file originally began with a small YAML block (title, date, modified, author, guid, site) that fully duplicated the parquet metadata columns. This block has been removed so that content contains only the body text.
• Non-breaking spaces (U+00A0) have been normalized to regular spaces. The WordPress visual editor often inserts NBSP characters during composition; 32.192 such characters across 4.192 articles were replaced with regular spaces. This affects whitespace only and does not change any visible text.
• WordPress shortcodes are preserved verbatim. Tokens such as [featured-video-plus], [wikiful url=...], [caption], [gallery], etc. are kept as-is. They reflect dynamic content (embedded videos, galleries, plugin output) that is not resolvable from the static export. See Known Data Quality Notes.
• Inline HTML is preserved verbatim. Some posts contain inline <table>, <iframe>, <sup>/<sub> and similar fragments authored by the editors; these are kept as written. Most "HTML-looking" tags found by a tag-shape regex are actually Markdown autolinks of the form <https://example.com>, which Markdown explicitly supports.
• Markdown links, headings, lists and emphasis are preserved. No flattening to plain text is performed, so downstream consumers that need raw text can apply their own Markdown parser.

Known Data Quality Notes

The dataset reflects the source as faithfully as possible. The following quirks exist on the live ellak.gr sites and have therefore been preserved, not silently corrected:

• Cross-posted articles. 43 articles (86 rows) are mirrored across two subdomains of the EELLAK network: the same canonical guid appears once under its origin site (typically oer.ellak.gr or opensource.ellak.gr) and once under edu.ellak.gr. Each mirror has its own (site, id) and is treated as a separate row. Users who want a deduplicated view at the article level can group by guid.
• post_modified earlier than post_date. 358 rows have post_modified < post_date. This is a known WordPress behavior for back-dated, imported, or migrated posts (e.g. articles re-published after the WordPress instance was upgraded). The values are taken as-is from the source database.
• Very short articles. 16 articles have fewer than 5 words. The vast majority are opendesign.ellak.gr portfolio entries whose body on the live site is just an embedded video shortcode ([featured-video-plus]); a handful of others are placeholder posts. They are kept for completeness because they exist as published articles on the source sites.
• WordPress shortcodes inside content. Posts that rely on plugins (galleries, embedded videos, dynamic widgets) contain unresolved shortcodes. Resolving them would require executing the original WordPress runtime against the original databases.

Usage

This dataset is useful for:

• Natural Language Processing (NLP) tasks for Modern Greek, especially in the technology, civic-tech, open-government, and open-source policy registers
• Building Greek language models, lexicons, or domain-adapted embeddings for the open-technology and digital-rights domain
• Topic modeling, named-entity recognition, and event extraction over a long-running, thematically coherent corpus (2008–2026)
• Diachronic studies of Greek public discourse on open data, open government, digital privacy, and free software
• Information-retrieval and Q&A systems over the EELLAK editorial archive

License

This dataset is licensed under the Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) license. EELLAK is the publisher of the source content and authorizes its redistribution under this license. When using this dataset, please attribute:

EELLAK Network Articles, glossAPI (EELLAK), derived from the network of ellak.gr editorial sites of the Greek Free / Open Source Software Society, licensed under CC BY-SA 4.0.

Contact

For feedback contact: glossapi.team@eellak.gr