---
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.:

```python
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)](https://creativecommons.org/licenses/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