# FAQ **URL:** https://forum.clarin.eu/c/faq/10.md?page=1 [Latest](https://forum.clarin.eu/latest.md) · [Categories](https://forum.clarin.eu/categories.md) · [Tags](https://forum.clarin.eu/tags.md) **Page:** 2 --- ## [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 … --- ## [I have a fedora repository. How can I offer my CMDI files over OAI-PMH?](https://forum.clarin.eu/t/i-have-a-fedora-repository-how-can-i-offer-my-cmdi-files-over-oai-pmh/472)
**Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [12 September 2024 16:38 UTC](https://forum.clarin.eu/t/i-have-a-fedora-repository-how-can-i-offer-my-cmdi-files-over-oai-pmh/472 "2024-09-12T16:38:25Z")
The CLARIN-D team in Leipzig has written an excellent guide explaining how to do this. (in German) --- ## [If I am hosting a hierarchical CMDI metadata collection, do I need to offer all records over OAI-PMH or only the root nodes?](https://forum.clarin.eu/t/if-i-am-hosting-a-hierarchical-cmdi-metadata-collection-do-i-need-to-offer-all-records-over-oai-pmh-or-only-the-root-nodes/473)
**Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [12 September 2024 16:43 UTC](https://forum.clarin.eu/t/if-i-am-hosting-a-hierarchical-cmdi-metadata-collection-do-i-need-to-offer-all-records-over-oai-pmh-or-only-the-root-nodes/473 "2024-09-12T16:43:35Z")
Short answer: as indicated in the OAI-PMH protocol, you need to offer all records. There is no automatic harvesting of any of the CMDI child nodes. Long answer: in the case of our toy example hierarchy, you would need t… --- ## [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. --- ## [How often is the content of the metadata curation dashboard updated?](https://forum.clarin.eu/t/how-often-is-the-content-of-the-metadata-curation-dashboard-updated/459)
**Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [12 September 2024 13:55 UTC](https://forum.clarin.eu/t/how-often-is-the-content-of-the-metadata-curation-dashboard-updated/459 "2024-09-12T13:55:37Z")
The CLARIN Curation Dashboard analyses the metadata harvested for inclusion in the VLO. It creates reports for metdata collections on basis of a schedule. At the end of the procedure which takes about 2 hours, the curati… --- ## [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… --- ## [If anybody can create metadata components, how can you still search through the resulting metadata descriptions?](https://forum.clarin.eu/t/if-anybody-can-create-metadata-components-how-can-you-still-search-through-the-resulting-metadata-descriptions/457)
**Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [12 September 2024 13:48 UTC](https://forum.clarin.eu/t/if-anybody-can-create-metadata-components-how-can-you-still-search-through-the-resulting-metadata-descriptions/457 "2024-09-12T13:48:39Z")
There are indeed issues with searching if people aren’t using matching descriptions. Think of someone calling a collection of texts a “text collection”, while someone else might be searching for a “(text) corpus”. A pers… --- ## [What is metadata?](https://forum.clarin.eu/t/what-is-metadata/456)
**Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [12 September 2024 13:04 UTC](https://forum.clarin.eu/t/what-is-metadata/456 "2024-09-12T13:04:47Z")
Metadata is data about data: information describing properties of linguistic resources, for instance the size of a corpus, the recording date of a speech file, the purpose for which annotations were created. For informa… --- ## [What is a metadata scheme?](https://forum.clarin.eu/t/what-is-a-metadata-scheme/455)
**Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [12 September 2024 13:04 UTC](https://forum.clarin.eu/t/what-is-a-metadata-scheme/455 "2024-09-12T13:04:11Z")
A fixed set of elements for the description of resources. Think of the traditional filing cards in the library, specifying the writer and title of each book. For more information on metadata in CLARIN, visit www.clarin.… --- ## [What metadata scheme is used within CLARIN?](https://forum.clarin.eu/t/what-metadata-scheme-is-used-within-clarin/454)
**Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [12 September 2024 13:02 UTC](https://forum.clarin.eu/t/what-metadata-scheme-is-used-within-clarin/454 "2024-09-12T13:02:56Z")
Good question. In fact, there is no such thing as a single CLARIN metadata scheme. Practice showed that using a single scheme for a large community (e.g. the Humanities) often results in a mismatch between the chosen ele… --- ## [If there is no single metadata scheme, how should I describe my resources in order for them to be compatible with the CLARIN infrastructure?](https://forum.clarin.eu/t/if-there-is-no-single-metadata-scheme-how-should-i-describe-my-resources-in-order-for-them-to-be-compatible-with-the-clarin-infrastructure/453)
**Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [12 September 2024 13:01 UTC](https://forum.clarin.eu/t/if-there-is-no-single-metadata-scheme-how-should-i-describe-my-resources-in-order-for-them-to-be-compatible-with-the-clarin-infrastructure/453 "2024-09-12T13:01:58Z")
CLARIN proposes a component-based approach: you can combine several metadata components (sets of metadata elements) into a self-defined scheme that suits your particular needs. Of course you can share your profile with o… --- ## [How can I create a hierarchical collection with CMDI?](https://forum.clarin.eu/t/how-can-i-create-a-hierarchical-collection-with-cmdi/451)
**Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [12 September 2024 12:54 UTC](https://forum.clarin.eu/t/how-can-i-create-a-hierarchical-collection-with-cmdi/451 "2024-09-12T12:54:43Z")
Link from the parent .cmdi file to the child .cmdi file with a ResourceProxy that has the ResourceType Metadata. E.g. http://infra.clarin.eu/cmd/example/collection/collection\_root.cmdi has 2 child collections: http://… --- ## [Is there a CMDI profile I can use to describe web services?](https://forum.clarin.eu/t/is-there-a-cmdi-profile-i-can-use-to-describe-web-services/450)
**Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [12 September 2024 12:53 UTC](https://forum.clarin.eu/t/is-there-a-cmdi-profile-i-can-use-to-describe-web-services/450 "2024-09-12T12:53:39Z")
There are multiple suitable profiles, as described in the CMDI core model for web services (and extended documentation). See also the following paper: Windhouwer, M., Broeder, D., & Van Uytvanck, D. (2012). A CMD core … --- ## [How can I specify additional details about a ResourceProxy?](https://forum.clarin.eu/t/how-can-i-specify-additional-details-about-a-resourceproxy/448)
**Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [12 September 2024 12:25 UTC](https://forum.clarin.eu/t/how-can-i-specify-additional-details-about-a-resourceproxy/448 "2024-09-12T12:25:16Z")
The information that a ResourceProxy can contain (a URL and mimetype) is kept very minimal, on purpose. However you can use any CMDI component to add more details about such a ResourceProxy, using the id attribute. E.g.… --- ## [What parts does a CMDI metadata file have?](https://forum.clarin.eu/t/what-parts-does-a-cmdi-metadata-file-have/447)
**Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [12 September 2024 11:52 UTC](https://forum.clarin.eu/t/what-parts-does-a-cmdi-metadata-file-have/447 "2024-09-12T11:52:57Z")
Each CMDI files consists of 3 parts: a (fixed) Header, containing administrative information: MdCreator: the author of the file e.g. “Eric Carlson” MdCreationDate: the creation date of this file e.g. “2016-12-31” … --- ## [How do I know on which profile a CMDI file is based?](https://forum.clarin.eu/t/how-do-i-know-on-which-profile-a-cmdi-file-is-based/446)
**Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [12 September 2024 11:51 UTC](https://forum.clarin.eu/t/how-do-i-know-on-which-profile-a-cmdi-file-is-based/446 "2024-09-12T11:51:30Z")
The MdProfile element (in the Header section) contains a unique profile code (e.g.: clarin.eu:cr1:p\_1290431694484). Alternatively you can also find the profile identifier as part of the schema location, for example (CMDI… --- ## [Can I use multiple languages in my metadata description?](https://forum.clarin.eu/t/can-i-use-multiple-languages-in-my-metadata-description/444)
**Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [12 September 2024 11:47 UTC](https://forum.clarin.eu/t/can-i-use-multiple-languages-in-my-metadata-description/444 "2024-09-12T11:47:39Z")
Yes. If you tick the checkmark next to Multilingual for an element in the Component Registry, it will result in a multilingual field. With the xml:lang attribute you can then indicate the language in which an element has… --- ## [Is there a list of recommend components and profiles?](https://forum.clarin.eu/t/is-there-a-list-of-recommend-components-and-profiles/443)
**Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [12 September 2024 11:20 UTC](https://forum.clarin.eu/t/is-there-a-list-of-recommend-components-and-profiles/443 "2024-09-12T11:20:20Z")
As a starting point, see the list below. We are working to extend it. Components with controlled vocabularies For languages: (with fallback to string): cmdi-language (short list): iso-language-639-1 (long list): iso-… --- ## [How can I indicate that the resources described with a CMDI file are also searchable via SRU/CQL?](https://forum.clarin.eu/t/how-can-i-indicate-that-the-resources-described-with-a-cmdi-file-are-also-searchable-via-sru-cql/442)
**Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [12 September 2024 11:19 UTC](https://forum.clarin.eu/t/how-can-i-indicate-that-the-resources-described-with-a-cmdi-file-are-also-searchable-via-sru-cql/442 "2024-09-12T11:19:10Z")
This can be done with a ResourceProxy where: ResourceType = SearchService mimetype = application/sru+xml e.g.: \ \SearchService\ \ **Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [12 September 2024 11:16 UTC](https://forum.clarin.eu/t/how-can-i-create-an-xsd-xml-schema-from-my-cmdi-profile/441 "2024-09-12T11:16:32Z") In the Component Registry: open the drop down menu on the far right column of the profile’s row and select Download XSD (CMDI 1.1) or Download XSD (CMDI 1.2) depending on the support and requirements of your tools, repo… --- ## [What media type (MIME type) should I use for CMDI files?](https://forum.clarin.eu/t/what-media-type-mime-type-should-i-use-for-cmdi-files/440)
**Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [12 September 2024 11:15 UTC](https://forum.clarin.eu/t/what-media-type-mime-type-should-i-use-for-cmdi-files/440 "2024-09-12T11:15:29Z")
application/x-cmdi+xml --- ## [How can I indicate that the resources described with a CMDI file are also searchable via a specialised web application?](https://forum.clarin.eu/t/how-can-i-indicate-that-the-resources-described-with-a-cmdi-file-are-also-searchable-via-a-specialised-web-application/439)
**Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [12 September 2024 11:14 UTC](https://forum.clarin.eu/t/how-can-i-indicate-that-the-resources-described-with-a-cmdi-file-are-also-searchable-via-a-specialised-web-application/439 "2024-09-12T11:14:47Z")
This can be done with a ResourceProxy where: ResourceType = SearchPage e.g.: \ \SearchPage\ \http://corpus1.mpi.nl/ds/trova/search.jsp?nodeid=MPI86949… --- ## [How can I add a link to the original repository where a resource is hosted (landing page) to a CMDI record?](https://forum.clarin.eu/t/how-can-i-add-a-link-to-the-original-repository-where-a-resource-is-hosted-landing-page-to-a-cmdi-record/438)
**Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [10 September 2024 14:25 UTC](https://forum.clarin.eu/t/how-can-i-add-a-link-to-the-original-repository-where-a-resource-is-hosted-landing-page-to-a-cmdi-record/438 "2024-09-10T14:25:35Z")
If you want to add a link to the original context of the metadata file, e.g. to the repository where it is hosted (example), add a ResourceProxy of the type LandingPage, e.g.: \ \L… --- ## [I found a CMDI profile that almost matches my needs. Can I add some fields?](https://forum.clarin.eu/t/i-found-a-cmdi-profile-that-almost-matches-my-needs-can-i-add-some-fields/437)
**Author:** [@twagoo](https://forum.clarin.eu/u/twagoo)\ **Replies:** 0\ **Last updated:** [10 September 2024 14:20 UTC](https://forum.clarin.eu/t/i-found-a-cmdi-profile-that-almost-matches-my-needs-can-i-add-some-fields/437 "2024-09-10T14:20:41Z")
The fields of a profile are fixed, so you will need to use a different profile. Don’t worry, you can create your own. Since you found a profile that seems to almost match your needs, the most logical thing to do is to cr… [Previous page](https://forum.clarin.eu/c/faq/10.md) [Next page](https://forum.clarin.eu/c/faq/10.md?page=2)