| CARVIEW |
Select Language
HTTP/2 200
date: Wed, 08 Oct 2025 07:08:10 GMT
content-type: text/html; charset=utf-8
cache-control: max-age=0, private, must-revalidate
content-security-policy: default-src 'none'; base-uri 'self'; child-src github.githubassets.com github.com/assets-cdn/worker/ github.com/assets/ gist.github.com/assets-cdn/worker/; connect-src 'self' uploads.github.com www.githubstatus.com collector.github.com raw.githubusercontent.com api.github.com github-cloud.s3.amazonaws.com github-production-repository-file-5c1aeb.s3.amazonaws.com github-production-upload-manifest-file-7fdce7.s3.amazonaws.com github-production-user-asset-6210df.s3.amazonaws.com *.rel.tunnels.api.visualstudio.com wss://*.rel.tunnels.api.visualstudio.com github.githubassets.com objects-origin.githubusercontent.com copilot-proxy.githubusercontent.com proxy.individual.githubcopilot.com proxy.business.githubcopilot.com proxy.enterprise.githubcopilot.com *.actions.githubusercontent.com wss://*.actions.githubusercontent.com productionresultssa0.blob.core.windows.net/ productionresultssa1.blob.core.windows.net/ productionresultssa2.blob.core.windows.net/ productionresultssa3.blob.core.windows.net/ productionresultssa4.blob.core.windows.net/ productionresultssa5.blob.core.windows.net/ productionresultssa6.blob.core.windows.net/ productionresultssa7.blob.core.windows.net/ productionresultssa8.blob.core.windows.net/ productionresultssa9.blob.core.windows.net/ productionresultssa10.blob.core.windows.net/ productionresultssa11.blob.core.windows.net/ productionresultssa12.blob.core.windows.net/ productionresultssa13.blob.core.windows.net/ productionresultssa14.blob.core.windows.net/ productionresultssa15.blob.core.windows.net/ productionresultssa16.blob.core.windows.net/ productionresultssa17.blob.core.windows.net/ productionresultssa18.blob.core.windows.net/ productionresultssa19.blob.core.windows.net/ github-production-repository-image-32fea6.s3.amazonaws.com github-production-release-asset-2e65be.s3.amazonaws.com insights.github.com wss://alive.github.com wss://alive-staging.github.com api.githubcopilot.com api.individual.githubcopilot.com api.business.githubcopilot.com api.enterprise.githubcopilot.com; font-src github.githubassets.com; form-action 'self' github.com gist.github.com copilot-workspace.githubnext.com objects-origin.githubusercontent.com; frame-ancestors 'none'; frame-src viewscreen.githubusercontent.com notebooks.githubusercontent.com; img-src 'self' data: blob: github.githubassets.com media.githubusercontent.com camo.githubusercontent.com identicons.github.com avatars.githubusercontent.com private-avatars.githubusercontent.com github-cloud.s3.amazonaws.com objects.githubusercontent.com release-assets.githubusercontent.com secured-user-images.githubusercontent.com/ user-images.githubusercontent.com/ private-user-images.githubusercontent.com opengraph.githubassets.com marketplace-screenshots.githubusercontent.com/ copilotprodattachments.blob.core.windows.net/github-production-copilot-attachments/ github-production-user-asset-6210df.s3.amazonaws.com customer-stories-feed.github.com spotlights-feed.github.com objects-origin.githubusercontent.com *.githubusercontent.com; manifest-src 'self'; media-src github.com user-images.githubusercontent.com/ secured-user-images.githubusercontent.com/ private-user-images.githubusercontent.com github-production-user-asset-6210df.s3.amazonaws.com gist.github.com; script-src github.githubassets.com; style-src 'unsafe-inline' github.githubassets.com; upgrade-insecure-requests; worker-src github.githubassets.com github.com/assets-cdn/worker/ github.com/assets/ gist.github.com/assets-cdn/worker/
link: ; rel=preload; as=fetch; crossorigin=use-credentials
referrer-policy: no-referrer-when-downgrade
server-timing: issue_layout-fragment;desc="issue_layout fragment";dur=253.735436,issue_conversation_content-fragment;desc="issue_conversation_content fragment";dur=515.145607,nginx;desc="NGINX";dur=1.256805,glb;desc="GLB";dur=136.521722
strict-transport-security: max-age=31536000; includeSubdomains; preload
vary: X-PJAX, X-PJAX-Container, Turbo-Visit, Turbo-Frame, X-Requested-With, Accept,Accept-Encoding, Accept, X-Requested-With
x-content-type-options: nosniff
x-frame-options: deny
x-voltron-version: 266d7a9
x-xss-protection: 0
server: github.com
content-encoding: gzip
accept-ranges: bytes
set-cookie: _gh_sess=XcHHU0H99kb7jSuBm2zsD1%2FEJp86MBKaLH4mDAmgsC29RrylZxJ%2BPXs5qDhm0d%2BHLyoSBGQgBIRLwFl7Smes45Qr3Q5EbD7bwHKxpXr9YAIbmTr8yeCgES9DTlc%2Bd2wpwolHS2hZFy9cZZJ2MG3a%2BdxQaj36mUs1j5NXsb6U5p0EMlweXfErg%2FW6PMIAiUQRgJQPb0aA4xOpkPNfX6e%2BjnFOREtEDQw3Sek%2BvbBYH7wxfeNH0NDnYcL6hopb5A3RUCo5gYERiDVIv%2BYCNe9h1A%3D%3D--eQ15UyQfc3nOIK2R--%2FQ6R7Rvnr97voBmDDOJ56Q%3D%3D; Path=/; HttpOnly; Secure; SameSite=Lax
set-cookie: _octo=GH1.1.2040644682.1759907290; Path=/; Domain=github.com; Expires=Thu, 08 Oct 2026 07:08:10 GMT; Secure; SameSite=Lax
set-cookie: logged_in=no; Path=/; Domain=github.com; Expires=Thu, 08 Oct 2026 07:08:10 GMT; HttpOnly; Secure; SameSite=Lax
x-github-request-id: BCFE:20167C:193AB4:1BE255:68E60DDA
Losing Last Element in RDF List · Issue #530 · json-ld/json-ld.org · GitHub
Skip to content
Navigation Menu
{{ message }}
-
Notifications
You must be signed in to change notification settings - Fork 159
Closed
Description
We have web application that needs to be able to modify RDF lists from a triple store and propagate the changes back. To do this, we are utilizing jsonld-java to serialize the RDF into JSON-LD, modifying it in the web app, and then sending it back to be deserialized and stored in the triple store. Originally, we were using blank nodes like the ones shown in Turtle below.
<https://example.com> <https://example.com/property> _:a .
_:a a <https://www.w3.org/1999/02/22-rdf-syntax-ns#List> ;
<https://www.w3.org/1999/02/22-rdf-syntax-ns#first> "a" ;
<https://www.w3.org/1999/02/22-rdf-syntax-ns#rest> _:b .
_:b a <https://www.w3.org/1999/02/22-rdf-syntax-ns#List> ;
<https://www.w3.org/1999/02/22-rdf-syntax-ns#first> "b" ;
<https://www.w3.org/1999/02/22-rdf-syntax-ns#rest> _:c .
_:c a <https://www.w3.org/1999/02/22-rdf-syntax-ns#List> ;
<https://www.w3.org/1999/02/22-rdf-syntax-ns#first> "c" ;
<https://www.w3.org/1999/02/22-rdf-syntax-ns#rest> <https://www.w3.org/1999/02/22-rdf-syntax-ns#nil> .
However, we discovered that blank node lists are collapsed during serialization thus losing all the blank node IDs.
[ {
"@id" : "https://example.com",
"https://example.com/property" : [ {
"@list" : [ {
"@value" : "a"
}, {
"@value" : "b"
}, {
"@value" : "c"
} ]
} ]
} ]With blank node IDs removed, we are no longer able to reference the existing RDF in the triple store to perform updates when the lists are modified in the web-app without much more complex logic. To avoid this, we skolemized the blank node IDs into IRIs.
<https://example.com> <https://example.com/property> <urn:a> .
<urn:a> a <https://www.w3.org/1999/02/22-rdf-syntax-ns#List> ;
<https://www.w3.org/1999/02/22-rdf-syntax-ns#first> "a" ;
<https://www.w3.org/1999/02/22-rdf-syntax-ns#rest> <urn:b> .
<urn:b> a <https://www.w3.org/1999/02/22-rdf-syntax-ns#List> ;
<https://www.w3.org/1999/02/22-rdf-syntax-ns#first> "b" ;
<https://www.w3.org/1999/02/22-rdf-syntax-ns#rest> <urn:c> .
<urn:c> a <https://www.w3.org/1999/02/22-rdf-syntax-ns#List> ;
<https://www.w3.org/1999/02/22-rdf-syntax-ns#first> "c" ;
<https://www.w3.org/1999/02/22-rdf-syntax-ns#rest> <https://www.w3.org/1999/02/22-rdf-syntax-ns#nil> .
However, when serializing the skolemized triples, the IRI for the last element in the RDF list is hidden, in this case urn:c. This leads to the same problem we were having when using blank node IDs.
[ {
"@id" : "https://example.com",
"https://example.com/property" : [ {
"@id" : "urn:a"
} ]
}, {
"@id" : "urn:a",
"@type" : [ "https://www.w3.org/1999/02/22-rdf-syntax-ns#List" ],
"https://www.w3.org/1999/02/22-rdf-syntax-ns#first" : [ {
"@value" : "a"
} ],
"https://www.w3.org/1999/02/22-rdf-syntax-ns#rest" : [ {
"@id" : "urn:b"
} ]
}, {
"@id" : "urn:b",
"@type" : [ "https://www.w3.org/1999/02/22-rdf-syntax-ns#List" ],
"https://www.w3.org/1999/02/22-rdf-syntax-ns#first" : [ {
"@value" : "b"
} ],
"https://www.w3.org/1999/02/22-rdf-syntax-ns#rest" : [ {
"@list" : [ {
"@value" : "c"
} ]
} ]
} ]Issue #277 seems to be the point where the implementation changed from serializing lists in the manner we expect to this new compact way. Is there any way we can get around this so that the last blank node of a list is not collapsed?
You can’t perform that action at this time.