# Linked Data **URL:** https://forum.solidproject.org/c/build-a-solid-app/linked-data/33.md [Latest](https://forum.solidproject.org/latest.md) · [Categories](https://forum.solidproject.org/categories.md) · [Tags](https://forum.solidproject.org/tags.md) --- ## [About the Linked Data category](https://forum.solidproject.org/t/about-the-linked-data-category/2813)
**Author:** [@MitziLaszlo](https://forum.solidproject.org/u/MitziLaszlo)\ **Replies:** 0
A place to discuss linked data in the context of building a Solid app. --- ## [Are there some Linked data websites use distributed sparql Endpoints and provide cross-domain data search services?](https://forum.solidproject.org/t/are-there-some-linked-data-websites-use-distributed-sparql-endpoints-and-provide-cross-domain-data-search-services/6122)
**Author:** [@chenkun](https://forum.solidproject.org/u/chenkun)\ **Replies:** 8\ **Last updated:** [January 12, 2025, 9:39pm UTC](https://forum.solidproject.org/t/are-there-some-linked-data-websites-use-distributed-sparql-endpoints-and-provide-cross-domain-data-search-services/6122 "2025-01-12T21:39:46Z")
Is there a website x: Searching rdf resources from distributed sparql Endpoints. Rdf resources come from multiple subject areas and are related . Provide some semantic services such as QA, route search … I found that: … --- ## [\[Solved\] Named RDF Lists (collections) is not allowed?](https://forum.solidproject.org/t/solved-named-rdf-lists-collections-is-not-allowed/7438)
**Author:** [@renyuneyun](https://forum.solidproject.org/u/renyuneyun)\ **Replies:** 9\ **Last updated:** [April 22, 2024, 10:22am UTC](https://forum.solidproject.org/t/solved-named-rdf-lists-collections-is-not-allowed/7438 "2024-04-22T10:22:49Z")
When using Mashlib/SolidOS, when editing a Turtle file with lists (rdf:List), we encounter some unexpected behaviour. In particular, it will refuse to save the file if the list is named. For example, this document is v… --- ## [Accessing other PODs (public) data (Like Button)](https://forum.solidproject.org/t/accessing-other-pods-public-data-like-button/6691)
**Author:** [@Robin](https://forum.solidproject.org/u/Robin)\ **Replies:** 1\ **Last updated:** [June 23, 2023, 11:39am UTC](https://forum.solidproject.org/t/accessing-other-pods-public-data-like-button/6691 "2023-06-23T11:39:26Z")
Hi all! I am developing an app that shows images and that you can (dis)like. I managed to read the images, and store the seen images on the users pod. Now, if I add a like, I want that other people using the app can se… --- ## [Migrating centrally-stored user data to Solid Pods](https://forum.solidproject.org/t/migrating-centrally-stored-user-data-to-solid-pods/6423)
**Author:** [@schmudde](https://forum.solidproject.org/u/schmudde)\ **Replies:** 8\ **Last updated:** [May 16, 2023, 6:53pm UTC](https://forum.solidproject.org/t/migrating-centrally-stored-user-data-to-solid-pods/6423 "2023-05-16T18:53:16Z")
Are there any case studies for this? We are building features that we would like to migrate down the line. Are there best practices? Should we adopt a triple store database today to make things easier tomorrow? --- ## [I need help for my thesis proof-of-concept](https://forum.solidproject.org/t/i-need-help-for-my-thesis-proof-of-concept/6568)
**Author:** [@Thibo-De-Reu](https://forum.solidproject.org/u/Thibo-De-Reu)\ **Replies:** 2\ **Last updated:** [May 2, 2023, 6:47pm UTC](https://forum.solidproject.org/t/i-need-help-for-my-thesis-proof-of-concept/6568 "2023-05-02T18:47:14Z")
Hi everyone My name is Thibo and I’m a student located in Belgium. I’m currently working on a proof-of-concept for my thesis and I’m a little bit stuck. I hope I can find some help here. The idea of my application: A … --- ## [Are there some Linked data websites use distributed sparql Endpoints and provide cross-domain data search services ?](https://forum.solidproject.org/t/are-there-some-linked-data-websites-use-distributed-sparql-endpoints-and-provide-cross-domain-data-search-services/6120)
**Author:** [@chenkun](https://forum.solidproject.org/u/chenkun)\ **Replies:** 0\ **Last updated:** [February 5, 2023, 3:43pm UTC](https://forum.solidproject.org/t/are-there-some-linked-data-websites-use-distributed-sparql-endpoints-and-provide-cross-domain-data-search-services/6120 "2023-02-05T15:43:18Z")
I found that: ‘https://lod-cloud.net/’ didn’t provide data content search . ‘http://linkedlifedata.com/’ puts all the data into the same sparql endpoint and separates it with a graph . --- ## [Using Netlify Edge Functions to transform RDFa (text/html) into Turtle](https://forum.solidproject.org/t/using-netlify-edge-functions-to-transform-rdfa-text-html-into-turtle/5765)
**Author:** [@ThisIsMissEm](https://forum.solidproject.org/u/ThisIsMissEm)\ **Replies:** 1\ **Last updated:** [October 31, 2022, 5:41pm UTC](https://forum.solidproject.org/t/using-netlify-edge-functions-to-transform-rdfa-text-html-into-turtle/5765 "2022-10-31T17:41:47Z")
A little Sunday night hack: @Virginia writes her website with RDFa in the HTML, and we wanted to be able to query it as a Solid Dataset, without needing to move it to a solid server. Sure, you can query RDFa through comu… --- ## [How would you implement pingbacks in Solid?](https://forum.solidproject.org/t/how-would-you-implement-pingbacks-in-solid/5518)
**Author:** [@ThisIsMissEm](https://forum.solidproject.org/u/ThisIsMissEm)\ **Replies:** 2\ **Last updated:** [July 30, 2022, 9:55am UTC](https://forum.solidproject.org/t/how-would-you-implement-pingbacks-in-solid/5518 "2022-07-30T09:55:28Z")
Currently if we want to build any sort of social app, we have the tools of inboxes and outboxes, activity streams, etc. These all work great, but they rely on either allowing a random entity on the internet append-based … --- ## [Mapping Turtle files to Javascript/Typescript objects](https://forum.solidproject.org/t/mapping-turtle-files-to-javascript-typescript-objects/5306)
**Author:** [@HBailly](https://forum.solidproject.org/u/HBailly)\ **Replies:** 26\ **Last updated:** [June 9, 2022, 9:52pm UTC](https://forum.solidproject.org/t/mapping-turtle-files-to-javascript-typescript-objects/5306 "2022-06-09T21:52:25Z")
Hi Community, This is probably a silly question, but how can one seamlessly convert RDF Quads into Javascript objects? Intent: I am trying to display and navigate RDF data in Typescript. I have Turtle files containing … --- ## [Documenting Ontologies](https://forum.solidproject.org/t/documenting-ontologies/5252)
**Author:** [@calummackervoy](https://forum.solidproject.org/u/calummackervoy)\ **Replies:** 10\ **Last updated:** [May 10, 2022, 1:51pm UTC](https://forum.solidproject.org/t/documenting-ontologies/5252 "2022-05-10T13:51:16Z")
Hi! Apologies if I’m asking this in the wrong place or if it’s been asked before (I missed it if so) All the best ontologies have human-readable documentation to explain their terms, and they follow a similar format, u… --- ## [How do I create new linked data in my Solid pod](https://forum.solidproject.org/t/how-do-i-create-new-linked-data-in-my-solid-pod/4926)
**Author:** [@Frederik](https://forum.solidproject.org/u/Frederik)\ **Replies:** 9\ **Last updated:** [December 6, 2021, 10:38am UTC](https://forum.solidproject.org/t/how-do-i-create-new-linked-data-in-my-solid-pod/4926 "2021-12-06T10:38:12Z")
I am creating an Angular application to save linked data in a pod. I am however new to linked data and using ontologies and am trying to find the best way to create for instance a survey with questions and answers follow… --- ## [Concept of an audit log for read data](https://forum.solidproject.org/t/concept-of-an-audit-log-for-read-data/4598)
**Author:** [@stoods](https://forum.solidproject.org/u/stoods)\ **Replies:** 1\ **Last updated:** [August 20, 2021, 12:33pm UTC](https://forum.solidproject.org/t/concept-of-an-audit-log-for-read-data/4598 "2021-08-20T12:33:11Z")
Is there currently a way of recording data that has been read from your solid pod, and, with the concept of ACP, who has read it. There are currently the notifications if data is created, updated or deleted. I don’t wa… --- ## [How can user check for write permissions? (Without control permissions)](https://forum.solidproject.org/t/how-can-user-check-for-write-permissions-without-control-permissions/4247)
**Author:** [@jenda](https://forum.solidproject.org/u/jenda)\ **Replies:** 3\ **Last updated:** [April 25, 2021, 7:10pm UTC](https://forum.solidproject.org/t/how-can-user-check-for-write-permissions-without-control-permissions/4247 "2021-04-25T19:10:18Z")
Hi, I am trying to create an app, where part of the functionality is access management to specific documents via ACL files. I am now at a stage, where a user with Control permissions is able to read an ACL file and par… --- ## [Your advertising profile and having alternate profiles (to share)](https://forum.solidproject.org/t/your-advertising-profile-and-having-alternate-profiles-to-share/4106)
**Author:** [@Psycop](https://forum.solidproject.org/u/Psycop)\ **Replies:** 0\ **Last updated:** [March 17, 2021, 11:33am UTC](https://forum.solidproject.org/t/your-advertising-profile-and-having-alternate-profiles-to-share/4106 "2021-03-17T11:33:16Z")
Not sure if this forum is also meant to discuss vocabularies and schema’s and such (if not, please point me to a better platform) I’m trying to parse my linkedin data (I requested a copy) to rdf. One of the aspects is … --- ## [TerminusDB a delightful database for linked data](https://forum.solidproject.org/t/terminusdb-a-delightful-database-for-linked-data/3140)
**Author:** [@aschrijver](https://forum.solidproject.org/u/aschrijver)\ **Replies:** 5\ **Last updated:** [November 26, 2020, 12:32pm UTC](https://forum.solidproject.org/t/terminusdb-a-delightful-database-for-linked-data/3140 "2020-11-26T12:32:16Z")
I recently started delightful project, and - while adding a bunch of graph db’s to delightful-databases - bumped into TerminusDB. I think this is a very interesting project for those working with linked data. I won’t du… --- ## [A graphql-esque framework to query linked data](https://forum.solidproject.org/t/a-graphql-esque-framework-to-query-linked-data/3524)
**Author:** [@anon85132706](https://forum.solidproject.org/u/anon85132706)\ **Replies:** 4\ **Last updated:** [October 30, 2020, 11:51am UTC](https://forum.solidproject.org/t/a-graphql-esque-framework-to-query-linked-data/3524 "2020-10-30T11:51:17Z")
I am thinking about implementing a framework that is inspired by the design of graphql and the prisma client to query linked data. This is my design draft that also includes some intentions behind this: https://docs.goo… --- ## [Full-stack linked data: lessons from building an RDF web app](https://forum.solidproject.org/t/full-stack-linked-data-lessons-from-building-an-rdf-web-app/3532)
**Author:** [@megoth](https://forum.solidproject.org/u/megoth)\ **Replies:** 0\ **Last updated:** [October 23, 2020, 8:27pm UTC](https://forum.solidproject.org/t/full-stack-linked-data-lessons-from-building-an-rdf-web-app/3532 "2020-10-23T20:27:37Z")
--- ## [Aligning efforts in LD schema / ontology design + adoption](https://forum.solidproject.org/t/aligning-efforts-in-ld-schema-ontology-design-adoption/3174)
**Author:** [@aschrijver](https://forum.solidproject.org/u/aschrijver)\ **Replies:** 21\ **Last updated:** [September 30, 2020, 9:54am UTC](https://forum.solidproject.org/t/aligning-efforts-in-ld-schema-ontology-design-adoption/3174 "2020-09-30T09:54:51Z")
When it comes to what is out there on the web in terms of linked data, one can only conclude that it is a big sprawling mess. It is really hard to get good ontologies together in an application, and - after doing so - av… --- ## [Making your Solid Apps interoperable with ShapeRepo.com](https://forum.solidproject.org/t/making-your-solid-apps-interoperable-with-shaperepo-com/3366)
**Author:** [@megoth](https://forum.solidproject.org/u/megoth)\ **Replies:** 6\ **Last updated:** [September 25, 2020, 11:01pm UTC](https://forum.solidproject.org/t/making-your-solid-apps-interoperable-with-shaperepo-com/3366 "2020-09-25T23:01:44Z")
https://medium.com/@JacksonMorgan/making-your-solid-apps-interoperable-with-shaperepo-com-8da512936073 --- ## [What ontology for social networking : status and comments](https://forum.solidproject.org/t/what-ontology-for-social-networking-status-and-comments/3444)
**Author:** [@walter.almeida](https://forum.solidproject.org/u/walter.almeida)\ **Replies:** 17\ **Last updated:** [September 23, 2020, 7:04am UTC](https://forum.solidproject.org/t/what-ontology-for-social-networking-status-and-comments/3444 "2020-09-23T07:04:54Z")
Hey everyone ! I am working on a demonstration app for a social network built on SOLID. I understant that the FOAF ontology is to be used. However I don’t understand how to represent the notion of post and comments : W… --- ## [N-quads to hdt with javascript in a browser?](https://forum.solidproject.org/t/n-quads-to-hdt-with-javascript-in-a-browser/3193)
**Author:** [@anon36056958](https://forum.solidproject.org/u/anon36056958)\ **Replies:** 0\ **Last updated:** [June 9, 2020, 7:40pm UTC](https://forum.solidproject.org/t/n-quads-to-hdt-with-javascript-in-a-browser/3193 "2020-06-09T19:40:27Z")
If anyone knows of a way to read n-quads and write to hdt, all done in javascript in a browser, please let me know :slight\_smile: --- ## [LD-Proofs JS-Implementation](https://forum.solidproject.org/t/ld-proofs-js-implementation/3128)
**Author:** [@fuubi](https://forum.solidproject.org/u/fuubi)\ **Replies:** 0\ **Last updated:** [May 29, 2020, 3:28pm UTC](https://forum.solidproject.org/t/ld-proofs-js-implementation/3128 "2020-05-29T15:28:17Z")
Does anybody know of a JavaScript implementation for Linked Data Proofs 1.0? According to this diagram, multiple implementations could exist. Unfortunately, I was not able to find any. If I understand the spec correctly… --- ## [What is the difference between a footprint and a shape?](https://forum.solidproject.org/t/what-is-the-difference-between-a-footprint-and-a-shape/1527)
**Author:** [@anon36056958](https://forum.solidproject.org/u/anon36056958)\ **Replies:** 4\ **Last updated:** [May 13, 2020, 10:29am UTC](https://forum.solidproject.org/t/what-is-the-difference-between-a-footprint-and-a-shape/1527 "2020-05-13T10:29:00Z")
I’ve heard mention of ‘footprint’ in the w3c community minutes but I would like to find out what that is. Shapes are in shacl or shex and I found documents on those. Thanks --- ## [Can shapes be recursive?](https://forum.solidproject.org/t/can-shapes-be-recursive/3008)
**Author:** [@anon36056958](https://forum.solidproject.org/u/anon36056958)\ **Replies:** 0\ **Last updated:** [May 5, 2020, 1:24pm UTC](https://forum.solidproject.org/t/can-shapes-be-recursive/3008 "2020-05-05T13:24:37Z")
Can shapes be recursive? According to https://shexspec.github.io/spec/#shapeExprRef-requirement: “Additionally, a shapeExprLabel cannot refer to itself through a shape reference either directly or recursively.” but a… --- ## [Social Participation Ontology](https://forum.solidproject.org/t/social-participation-ontology/2915)
**Author:** [@anon36056958](https://forum.solidproject.org/u/anon36056958)\ **Replies:** 0\ **Last updated:** [April 17, 2020, 5:43pm UTC](https://forum.solidproject.org/t/social-participation-ontology/2915 "2020-04-17T17:43:08Z")
Here are some ontologies that have owl formats that have to do with social groups. They are based on the Basic Formal Ontology (Basic Formal Ontology (BFO) | Users) The Social Participation Ontology The Population an… --- ## [Form Model example](https://forum.solidproject.org/t/form-model-example/2867)
**Author:** [@anon36056958](https://forum.solidproject.org/u/anon36056958)\ **Replies:** 4\ **Last updated:** [April 14, 2020, 12:34am UTC](https://forum.solidproject.org/t/form-model-example/2867 "2020-04-14T00:34:15Z")
In trying to understand forms by looking at https://solid.github.io/solid-ui/Documentation/forms-intro.html, it helps to have an example ui ontology instance, which is what I think is called a form model, an example of w… --- ## [Is there an ontology for ontologies?](https://forum.solidproject.org/t/is-there-an-ontology-for-ontologies/2810)
**Author:** [@anon36056958](https://forum.solidproject.org/u/anon36056958)\ **Replies:** 16\ **Last updated:** [March 30, 2020, 11:28pm UTC](https://forum.solidproject.org/t/is-there-an-ontology-for-ontologies/2810 "2020-03-30T23:28:36Z")
Is there somewhere an ontology for ontologies? What would it need? intended domain collateral domains specialization of (some ontology) generalization of (some ontology) synonyms (in other ontologies) antonyms (in…