# \#vlo **URL:** https://forum.clarin.eu/tag/vlo/16.md [Latest](https://forum.clarin.eu/latest.md) · [Categories](https://forum.clarin.eu/categories.md) · [Tags](https://forum.clarin.eu/tags.md) --- ## [Mozilla Data Collective datasets can now be explored through CLARIN's Virtual Language Observatory (VLO)](https://forum.clarin.eu/t/mozilla-data-collective-datasets-can-now-be-explored-through-clarins-virtual-language-observatory-vlo/1476)
**Author:** [@Elisa](https://forum.clarin.eu/u/Elisa)\ **Replies:** 1\ **Last updated:** [28 September 2026 10:14 UTC](https://forum.clarin.eu/t/mozilla-data-collective-datasets-can-now-be-explored-through-clarins-virtual-language-observatory-vlo/1476 "2026-09-28T10:14:44Z")
Mozilla Data Collective datasets are now discoverable through CLARIN’s Virtual Language Observatory (VLO), the discovery service for language resources. Researchers, developers and language technology practitioners can n… --- ## [VLO 4.14.0 is now live in production](https://forum.clarin.eu/t/vlo-4-14-0-is-now-live-in-production/1534)
**Author:** [@radud](https://forum.clarin.eu/u/radud)\ **Replies:** 0\ **Last updated:** [20 August 2026 09:57 UTC](https://forum.clarin.eu/t/vlo-4-14-0-is-now-live-in-production/1534 "2026-08-20T09:57:57Z")
A new version of the VLO (Virtual Language Observatory) is now live at https://vlo.clarin.eu, after we finished our beta testing Changes in this version include: Tombstone records for removed records. When a record i… --- ## [FAIR Metadata for Specialised Corpora - How can CLARIN support the communities?](https://forum.clarin.eu/t/fair-metadata-for-specialised-corpora-how-can-clarin-support-the-communities/1025)
**Author:** [@egon](https://forum.clarin.eu/u/egon)\ **Replies:** 1\ **Last updated:** [24 October 2025 07:35 UTC](https://forum.clarin.eu/t/fair-metadata-for-specialised-corpora-how-can-clarin-support-the-communities/1025 "2025-10-24T07:35:44Z")
Returning to our presentation at the Annual Conference 2025: “Towards FAIR Metadata for Specialised Corpora: A Community-Informed Empirical Study of Schema Development in Two Communities” (slides), I wanted to link relev… --- ## [I have multiple OAI prefixes. How does the harvester deal with this?](https://forum.clarin.eu/t/i-have-multiple-oai-prefixes-how-does-the-harvester-deal-with-this/470)
**Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [12 September 2024 16:29 UTC](https://forum.clarin.eu/t/i-have-multiple-oai-prefixes-how-does-the-harvester-deal-with-this/470 "2024-09-12T16:29:33Z")
The harvester uses the namespace URI to detect the provided metadata format (http://www.clarin.eu/cmd/1 for CMDI 1.2, http://www.clarin.eu/cmd/ for older versions), so all prefixes get included automatically. See the OA… --- ## [Radboud Data Repository data sets in the VLO](https://forum.clarin.eu/t/radboud-data-repository-data-sets-in-the-vlo/688)
**Author:** [@dieter](https://forum.clarin.eu/u/dieter)\ **Replies:** 0\ **Last updated:** [3 February 2025 13:16 UTC](https://forum.clarin.eu/t/radboud-data-repository-data-sets-in-the-vlo/688 "2025-02-03T13:16:09Z")
The Centre for Language Studies and Radboud Institute for Culture & History collections from the Radboud Data Repository are now also findable via the VLO (The Collection facet will later on get a more meaningful value,… --- ## [I have a DSpace repository. How can I offer my CMDI files over OAI-PMH?](https://forum.clarin.eu/t/i-have-a-dspace-repository-how-can-i-offer-my-cmdi-files-over-oai-pmh/468)
**Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [12 September 2024 16:25 UTC](https://forum.clarin.eu/t/i-have-a-dspace-repository-how-can-i-offer-my-cmdi-files-over-oai-pmh/468 "2024-09-12T16:25:05Z")
CLARIN-DSpace supports providing CMDI (as well as metadata in various other formats) over the OAI-PMH protocol. This is the protocol that is used by CLARIN to “harvest” metadata records. The use of OAI-PMH within CLARIN… --- ## [ATRIUM Researchers' Survey - Participants Needed](https://forum.clarin.eu/t/atrium-researchers-survey-participants-needed/552)
**Author:** [@IvdL](https://forum.clarin.eu/u/IvdL)\ **Replies:** 0\ **Last updated:** [14 November 2024 17:09 UTC](https://forum.clarin.eu/t/atrium-researchers-survey-participants-needed/552 "2024-11-14T17:09:36Z")
Dear colleagues, Thank you very much to those who distributed the ATRIUM survey in their national consortia. A gentle request to colleagues from Belgium, Finland, Italy, Spain, Slovenia and the Netherlands to send a rem… --- ## [Czech National Corpus in the VLO](https://forum.clarin.eu/t/czech-national-corpus-in-the-vlo/493)
**Author:** [@dieter](https://forum.clarin.eu/u/dieter)\ **Replies:** 0\ **Last updated:** [17 September 2024 13:42 UTC](https://forum.clarin.eu/t/czech-national-corpus-in-the-vlo/493 "2024-09-17T13:42:41Z")
All corpora provided by the Czech National Corpus are now available via the VLO. Thanks to an improved setup newly added corpora will also be visible via the Virtual Language Observatory. --- ## [Can I test-drive the VLO import for my CMDI metadata?](https://forum.clarin.eu/t/can-i-test-drive-the-vlo-import-for-my-cmdi-metadata/463)
**Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [12 September 2024 16:22 UTC](https://forum.clarin.eu/t/can-i-test-drive-the-vlo-import-for-my-cmdi-metadata/463 "2024-09-12T16:22:08Z")
Yes. If you contact cmdi@clarin.eu we can try to import your newly created CMDI metadata in the VLO Alpha instance, so that you get an idea how well the mapping to the VLO facets works. --- ## [If I deliver CLARIN metadata today, can you make my metadata available to the broad public?](https://forum.clarin.eu/t/if-i-deliver-clarin-metadata-today-can-you-make-my-metadata-available-to-the-broad-public/475)
**Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [13 September 2024 08:38 UTC](https://forum.clarin.eu/t/if-i-deliver-clarin-metadata-today-can-you-make-my-metadata-available-to-the-broad-public/475 "2024-09-13T08:38:26Z")
Yes - bringing all metadata descriptions together (“harvesting”, see harvesting) and making them searchable (“indexing”) is an important part of the infrastructure that CLARIN is building. When you provide CMDI metadata … --- ## [How can I publish my metadata to the Virtual Language Observatory (VLO)?](https://forum.clarin.eu/t/how-can-i-publish-my-metadata-to-the-virtual-language-observatory-vlo/474)
**Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [13 September 2024 08:37 UTC](https://forum.clarin.eu/t/how-can-i-publish-my-metadata-to-the-virtual-language-observatory-vlo/474 "2024-09-13T08:37:17Z")
If you have many metadata records or records that frequently change: Use OAI-PMH Provide them preferrably as CMDI (click here for details about how to serve CMDI over OAI-PMH) If that is not possible provide them as OL… --- ## [What is the update schedule for the metadata in the VLO?](https://forum.clarin.eu/t/what-is-the-update-schedule-for-the-metadata-in-the-vlo/462)
**Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [12 September 2024 16:18 UTC](https://forum.clarin.eu/t/what-is-the-update-schedule-for-the-metadata-in-the-vlo/462 "2024-09-12T16:18:25Z")
The metadata harvester runs with different configurations at different starting times: Monday and Thursday 20:00 CE(S)T: harvesting of CLARIN providers Friday 20:00 CE(S)T: harvesting of non-CLARIN providers The VLO i… --- ## [I have a self-developed repository. How can I offer my CMDI files over OAI-PMH?](https://forum.clarin.eu/t/i-have-a-self-developed-repository-how-can-i-offer-my-cmdi-files-over-oai-pmh/467)
**Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [12 September 2024 16:24 UTC](https://forum.clarin.eu/t/i-have-a-self-developed-repository-how-can-i-offer-my-cmdi-files-over-oai-pmh/467 "2024-09-12T16:24:21Z")
There are several packages available to setup an OAI provider, some popular examples: file-based, Tomcat web application written in Java: jOAI (some centres have good experiences with this one) database-based, written … --- ## [Which sources does CLARIN harvest from for the VLO?](https://forum.clarin.eu/t/which-sources-does-clarin-harvest-from-for-the-vlo/469)
**Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [12 September 2024 16:27 UTC](https://forum.clarin.eu/t/which-sources-does-clarin-harvest-from-for-the-vlo/469 "2024-09-12T16:27:10Z")
The OAI providers from the CLARIN centre registry (= the CLARIN B and C centres) A (relatively static) list of additional OAI providers (OLAC and CMDI) More (technical) details about the harvesting process and results … --- ## [How does the mapping to the VLO facets work?](https://forum.clarin.eu/t/how-does-the-mapping-to-the-vlo-facets-work/471)
**Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [12 September 2024 16:37 UTC](https://forum.clarin.eu/t/how-does-the-mapping-to-the-vlo-facets-work/471 "2024-09-12T16:37:31Z")
The VLO uses concepts from the CMDI profiles (and in some cases XPaths as a fallback). More information about this topic can be found in this paper. --- ## [Can I harvest myself? Where is the source code of the harvester?](https://forum.clarin.eu/t/can-i-harvest-myself-where-is-the-source-code-of-the-harvester/466)
**Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [12 September 2024 16:23 UTC](https://forum.clarin.eu/t/can-i-harvest-myself-where-is-the-source-code-of-the-harvester/466 "2024-09-12T16:23:21Z")
You can use the harvester yourself. Its source code is available at GitHub. If you only need access to the harvested files, you can also download these as a tarball. --- ## [Why do some of my records not appear in the VLO?](https://forum.clarin.eu/t/why-do-some-of-my-records-not-appear-in-the-vlo/461)
**Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [12 September 2024 16:16 UTC](https://forum.clarin.eu/t/why-do-some-of-my-records-not-appear-in-the-vlo/461 "2024-09-12T16:16:59Z")
If some or most of your records have been harvested and imported in the VLO fine, but some records seem to have been omitted, they were probably explicitly skipped by the VLO importer process. Records with no (valid) res… --- ## [How is the order in which records are displayed in the VLO determined?](https://forum.clarin.eu/t/how-is-the-order-in-which-records-are-displayed-in-the-vlo-determined/460)
**Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [12 September 2024 16:15 UTC](https://forum.clarin.eu/t/how-is-the-order-in-which-records-are-displayed-in-the-vlo-determined/460 "2024-09-12T16:15:39Z")
The result ranking is based on relevancy with respect to the query (if applicable) and a number of general record properties. This is further explained in the section Understanding Search Results of the VLO’s help page. --- ## [Why are some (of my) resources marked as unavailable or having restricted access in the VLO?](https://forum.clarin.eu/t/why-are-some-of-my-resources-marked-as-unavailable-or-having-restricted-access-in-the-vlo/458)
**Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [12 September 2024 13:53 UTC](https://forum.clarin.eu/t/why-are-some-of-my-resources-marked-as-unavailable-or-having-restricted-access-in-the-vlo/458 "2024-09-12T13:53:29Z")
All resources linked to from records that appear in the VLO are checked for accessibility at a regular basis as part of the processing by the CLARIN Curation Dashboard. The link checking information is read by the VLO w… --- ## [New collection Corpor@UCLouvain available in the VLO](https://forum.clarin.eu/t/new-collection-corpor-uclouvain-available-in-the-vlo/144)
**Author:** [@alekoe](https://forum.clarin.eu/u/alekoe)\ **Replies:** 0\ **Last updated:** [27 February 2024 16:25 UTC](https://forum.clarin.eu/t/new-collection-corpor-uclouvain-available-in-the-vlo/144 "2024-02-27T16:25:31Z")
Since today a new collection of Learner Corpora is available on the VLO. The collection Corpor@UCLouvain is provided by the CLARIN - Knowledge Centre for Learner Corpora and makes their almost 40 resources more easily d…