[ { "@id": "https://w3id.org/np/RAkIkmSiwDT-bgYZhGtknPhpkHsJcx0Q3nP0u8OyO_fZ4/assertion", "@graph": [ { "@id": "https://w3id.org/np/RAkIkmSiwDT-bgYZhGtknPhpkHsJcx0Q3nP0u8OyO_fZ4/get-view-displays-unresolved", "http://purl.org/dc/terms/description": [ { "@value": "Variant of get-view-displays (ref-scoped) that returns view references UNRESOLVED: the ?view column carries the version IRI the display/preset actually references (or, for space-governed pins, the governed resolution), and resolving a referenced version to the current supersedes-head is the CALLER's job (Nanodash: per-view latest-version lookups through ApiCache, forced refresh on own publishes). This removes the former run-once repo-wide resolution sub-select -- the query's dominant and fragility-prone cost, linear in the total view count -- leaving only bound point lookups; see nanopub-query doc/design-view-head-materialization.md for the measurements. Same inputs as get-view-displays-ref-scoped (resource = space IRI, root_np = the ref's root nanopub; authority gate scoped to that ref) and the same columns, plus ?governedBySpace: when bound, the row's ?view is the space-governed resolution (newest member+-signed version of its (kind, space) pair, kind validated as maintained resource; nanodash docs/views-and-presets-as-maintained-resources.md) and the caller must NOT apply supersedes-head resolution on top of it; when unbound, the caller resolves ?view to its latest version. ?viewKind is taken from the referenced version's own dct:isVersionOf (version-stable, hence equal to the head's kind), falling back to ?view itself for kind-less legacy views. Federation footprint (2026-08-20): the query now runs on the repo/full endpoint, so the former SERVICE hops to repo/full (preset branch) and to the ResourceView type repo (view lookups, governed candidates) are plain local patterns; only the two lookups of materialized space state (authority gate, governed-signer validation) remain federated, to repo/spaces. The previous 5-SERVICE layout was the main amplifier of a connection-pool deadlock in the query service's loopback federation (an outer query holds a pooled connection while each SERVICE hop -- one per binding under a nested-loop join -- requests another from the same pool): a thread dump during a production wedge showed all 60 route connections held by result streamers of exactly these hops. Validated byte-for-byte identical to the previous version across resources covering standalone displays, preset assignments, governed views, an agent's own page, and rival space refs." } ], "http://purl.org/dc/terms/license": [ { "@id": "http://www.apache.org/licenses/LICENSE-2.0" } ], "@type": [ "https://w3id.org/kpxl/grlc/grlc-query" ], "http://www.w3.org/2000/01/rdf-schema#label": [ { "@value": "Get view displays (unresolved versions)" } ], "https://w3id.org/kpxl/grlc/endpoint": [ { "@id": "https://w3id.org/np/l/nanopub-query-1.1/repo/full" } ], "https://w3id.org/kpxl/grlc/sparql": [ { "@value": "prefix rdfs: \nprefix dct: \nprefix np: \nprefix npa: \nprefix npx: \nprefix gen: \n\nselect distinct ?display ?view (coalesce(?pinKind, ?view) as ?viewKind) ?governedBySpace\n ?label ?displayType ?displayMode ?np ?pubkey ?date where {\n values ?_resource_multi_iri {}\n values ?_root_np_multi_iri {}\n service {\n graph npa:graph { npa:thisRepo npa:hasCurrentSpaceState ?stateG . }\n graph npa:spacesGraph { ?passedRef npa:rootNanopub ?_root_np_multi_iri . }\n {\n # Authority gate (issue #130 / nanodash#510): a single mandatory hop through the\n # governing space ref, which covers both a maintained resource and a space itself\n # (the reflexive self-edge), keyed on the role tier materialized on the\n # RoleInstantiation since #125. Replaces the old bare-IRI isMaintainedBy? hop and the\n # dead RoleDeclaration maintainer join. Ref variant: the governing ref is pinned to\n # ?passedRef (resolved from root_np), so authority cannot bleed across rival refs\n # claiming the same space IRI.\n graph ?stateG {\n ?_resource_multi_iri npa:hasGoverningSpaceRef ?passedRef .\n ?ri a gen:RoleInstantiation ; npa:forSpaceRef ?passedRef ; npa:hasRoleType ?roleType ; npa:forAgent ?authAgent .\n filter(?roleType = gen:AdminRole || ?roleType = gen:MaintainerRole)\n ?authAcct a npa:AccountState ; npa:agent ?authAgent ; npa:pubkey ?pubkey .\n }\n } union {\n graph ?stateG { ?selfAcct a npa:AccountState ; npa:agent ?_resource_multi_iri ; npa:pubkey ?pubkey . }\n }\n }\n {\n # branch (a): standalone view displays — LOCAL pattern on the endpoint repo\n graph npa:graph {\n ?np npx:hasNanopubType gen:ViewDisplay .\n ?np npa:hasValidSignatureForPublicKeyHash ?pubkey .\n filter not exists { ?npx npx:invalidates ?np ; npa:hasValidSignatureForPublicKeyHash ?pubkey . }\n ?np dct:created ?date .\n ?np npx:embeds ?display .\n ?np np:hasAssertion ?a .\n optional { ?np rdfs:label ?label }\n }\n graph ?a {\n ?display gen:isDisplayOfView ?refView .\n ?display gen:isDisplayFor ?_resource_multi_iri .\n optional { values ?displayType { gen:PartLevelViewDisplay gen:TopLevelViewDisplay } ?display a ?displayType . }\n optional { values ?displayMode { gen:ActivatedViewDisplay gen:DeactivatedViewDisplay } ?display a ?displayMode . }\n }\n }\n union\n {\n # branch (b): preset-supplied views — LOCAL since the endpoint moved to\n # repo/full (the connection-pinning SERVICE hop this replaced was the main\n # amplifier of the federation deadlock, eclipse-rdf4j/rdf4j federation +\n # nanopub-query loopback route). Kept wrapped in a sub-SELECT so its\n # bindings cannot collapse branch (a). ?display stays unbound.\n select ?refView ?label ?displayType ?displayMode ?np ?pubkey ?date ?_resource_multi_iri {\n { # was: service repo/full — now local on the repo/full endpoint\n graph npa:graph {\n ?np npx:hasNanopubType gen:PresetAssignment .\n ?np npa:hasValidSignatureForPublicKeyHash ?pubkey .\n filter not exists { ?npx npx:invalidates ?np ; npa:hasValidSignatureForPublicKeyHash ?pubkey . }\n ?np dct:created ?date .\n ?np npx:embeds ?assignment .\n ?np np:hasAssertion ?a .\n optional { ?np rdfs:label ?label }\n }\n graph ?a {\n ?assignment gen:isAssignmentFor ?_resource_multi_iri .\n ?assignment gen:isAssignmentOfPreset ?presetRef .\n optional { values ?displayMode { gen:ActivatedPresetAssignment gen:DeactivatedPresetAssignment } ?assignment a ?displayMode . }\n }\n graph npa:graph { ?presetNp npx:embeds ?presetRef ; np:hasAssertion ?pa . }\n graph ?pa {\n ?presetRef a gen:Preset .\n { ?presetRef gen:hasTopLevelView ?refView . bind(gen:TopLevelViewDisplay as ?displayType) }\n union { ?presetRef gen:hasView ?refView . bind(gen:PartLevelViewDisplay as ?displayType) }\n }\n }\n }\n }\n # Pin metadata of the referenced version (kind + optional governing space).\n # ?refView is bound by branch (a)/(b) at this point, so these are bound point\n # lookups for the handful of referenced views — now LOCAL joins (endpoint =\n # repo/full), where previously each was its own SERVICE round-trip: evaluated\n # under a nested-loop join, that fired one loopback HTTP request per\n # referenced view while the outer query held its own pooled connection — the\n # per-binding amplification at the heart of the federation deadlock. NOT\n # wrapped in a sub-select, deliberately: a run-once sub-select could not see\n # outer bindings and would have to enumerate every view in the repository\n # (the measured dominant cost of the former resolution variant;\n # supersedes-head resolution itself happens caller-side, per view, cached).\n optional {\n { # was: service repo/type/ec6722… (ResourceView shard) — now local on the repo/full endpoint\n graph npa:graph { ?rnp npx:embeds ?refView ; np:hasAssertion ?ra . }\n graph ?ra { ?refView a gen:ResourceView . }\n optional { graph ?ra { ?refView dct:isVersionOf ?pinKind . } }\n optional { graph ?ra { ?refView gen:governedBy ?pinSpace . } }\n }\n }\n # Space-governed resolution (gen:governedBy; nanodash docs/views-and-presets-as-\n # maintained-resources.md): a pinned version declaring a governing space resolves to\n # the newest member+-signed version of its (kind, space) pair instead of the\n # supersedes head; no valid candidate -> the pin stands. Joins on (?pinKind,\n # ?pinSpace) from the bound lookup above; rows without a governing space are\n # unaffected.\n optional {\n { select ?pinKind ?pinSpace (iri(strafter(max(concat(str(?cDate), \">\", str(?cver))), \">\")) as ?governedLatest) where {\n # Candidate versions — was a service on the ResourceView type shard, now\n # local on the repo/full endpoint. The sub-select wrapper is LOAD-BEARING,\n # not stylistic: on rdf4j 6.0.0, bindings produced by raw statement\n # patterns are silently NOT joined into a subsequent SERVICE clause\n # (empirically: identical bindings via VALUES join fine, via bare\n # patterns yield zero rows, and any projecting sub-select restores the\n # join — reproduced on two instances, 2026-08-20). Without this wrapper\n # the spaces SERVICE below returns nothing and governed resolution\n # silently falls back to the pin.\n { select ?pinKind ?pinSpace ?cver ?cpk ?cDate where {\n graph npa:graph {\n ?cnp dct:created ?cDate ; npa:hasValidSignatureForPublicKeyHash ?cpk ; npx:embeds ?cver ; np:hasAssertion ?ca .\n filter not exists { ?ci npx:invalidates ?cnp ; npa:hasValidSignatureForPublicKeyHash ?cpk . }\n }\n graph ?ca { ?cver dct:isVersionOf ?pinKind ; gen:governedBy ?pinSpace . }\n } }\n service {\n graph npa:graph { npa:hasCurrentSpaceState ?gsg . }\n graph ?gsg {\n ?pinKind npa:isMaintainedBy ?pinSpace ; npa:hasGoverningSpaceRef ?gref .\n ?gri a gen:RoleInstantiation ; npa:forSpace ?pinSpace ; npa:forSpaceRef ?gref ; npa:hasRoleType ?gtier ; npa:forAgent ?gag .\n filter(?gtier = gen:AdminRole || ?gtier = gen:MaintainerRole || ?gtier = gen:MemberRole)\n ?gacct a npa:AccountState ; npa:agent ?gag ; npa:pubkey ?cpk .\n }\n }\n } group by ?pinKind ?pinSpace }\n }\n bind(if(bound(?pinSpace), coalesce(?governedLatest, ?refView), ?refView) as ?view)\n bind(if(bound(?pinSpace), ?pinSpace, ?undef_) as ?governedBySpace)\n}\norder by desc(?date)" } ] } ] }, { "@id": "https://w3id.org/np/RAkIkmSiwDT-bgYZhGtknPhpkHsJcx0Q3nP0u8OyO_fZ4/provenance", "@graph": [ { "@id": "https://w3id.org/np/RAkIkmSiwDT-bgYZhGtknPhpkHsJcx0Q3nP0u8OyO_fZ4/assertion", "http://www.w3.org/ns/prov#wasAttributedTo": [ { "@id": "https://orcid.org/0000-0002-1267-0234" } ] } ] }, { "@id": "https://w3id.org/np/RAkIkmSiwDT-bgYZhGtknPhpkHsJcx0Q3nP0u8OyO_fZ4/pubinfo", "@graph": [ { "@id": "https://orcid.org/0000-0002-1267-0234", "http://xmlns.com/foaf/0.1/name": [ { "@value": "Tobias Kuhn" } ] }, { "@id": "https://w3id.org/np/RAkIkmSiwDT-bgYZhGtknPhpkHsJcx0Q3nP0u8OyO_fZ4", "http://purl.org/dc/terms/created": [ { "@value": "2026-08-20T06:18:42Z", "@type": "http://www.w3.org/2001/XMLSchema#dateTime" } ], "http://purl.org/dc/terms/creator": [ { "@id": "https://orcid.org/0000-0002-1267-0234" } ], "http://purl.org/dc/terms/license": [ { "@id": "https://creativecommons.org/licenses/by/4.0/" } ], "http://purl.org/nanopub/x/embeds": [ { "@id": "https://w3id.org/np/RAkIkmSiwDT-bgYZhGtknPhpkHsJcx0Q3nP0u8OyO_fZ4/get-view-displays-unresolved" } ], "http://purl.org/nanopub/x/supersedes": [ { "@id": "https://w3id.org/np/RAXdRFNLE1jB_NTaWrwIC9965SmZdZKB96VFnj1HvjdbY" } ], "http://www.w3.org/2000/01/rdf-schema#label": [ { "@value": "Get view displays (unresolved versions)" } ], "https://w3id.org/np/o/ntemplate/wasCreatedFromProvenanceTemplate": [ { "@id": "https://w3id.org/np/RA7lSq6MuK_TIC6JMSHvLtee3lpLoZDOqLJCLXevnrPoU" } ], "https://w3id.org/np/o/ntemplate/wasCreatedFromPubinfoTemplate": [ { "@id": "https://w3id.org/np/RA0J4vUn_dekg-U1kK3AOEt02p9mT2WO03uGxLDec1jLw" }, { "@id": "https://w3id.org/np/RAoTD7udB2KtUuOuAe74tJi1t3VzK0DyWS7rYVAq1GRvw" }, { "@id": "https://w3id.org/np/RAukAcWHRDlkqxk7H2XNSegc1WnHI569INvNr-xdptDGI" } ], "https://w3id.org/np/o/ntemplate/wasCreatedFromTemplate": [ { "@id": "https://w3id.org/np/RAEFAt-QcFK0ZhqfvlsmS10BnzGJA0xwOICZXkO-ai87k" } ] }, { "@id": "https://w3id.org/np/RAkIkmSiwDT-bgYZhGtknPhpkHsJcx0Q3nP0u8OyO_fZ4/sig", "http://purl.org/nanopub/x/hasAlgorithm": [ { "@value": "RSA" } ], "http://purl.org/nanopub/x/hasPublicKey": [ { "@value": "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCwUtewGCpT5vIfXYE1bmf/Uqu1ojqnWdYxv+ySO80ul8Gu7m8KoyPAwuvaPj0lvPtHrg000qMmkxzKhYknEjq8v7EerxZNYp5B3/3+5ZpuWOYAs78UnQVjbHSmDdmryr4D4VvvNIiUmd0yxci47dTFUj4DvfHnGd6hVe5+goqdcwIDAQAB" } ], "http://purl.org/nanopub/x/hasSignature": [ { "@value": "MurRHJuh+quO7K4wT+Tv2GvTuIp0RULmUH9jtr0LYCJ0hGQglNmHWN4nWXqVREZHVslpuo0ix6ZxbB8X27MH+CDo9GwsNubKPRz1FTOKlOiH3zJKTduxoJKELbbjHIR21lAAksHWtSL66aqTIUHEWPFVLYEBU2vP9oizO9VKoko=" } ], "http://purl.org/nanopub/x/hasSignatureTarget": [ { "@id": "https://w3id.org/np/RAkIkmSiwDT-bgYZhGtknPhpkHsJcx0Q3nP0u8OyO_fZ4" } ], "http://purl.org/nanopub/x/signedBy": [ { "@id": "https://orcid.org/0000-0002-1267-0234" } ] } ] }, { "@id": "https://w3id.org/np/RAkIkmSiwDT-bgYZhGtknPhpkHsJcx0Q3nP0u8OyO_fZ4/Head", "@graph": [ { "@id": "https://w3id.org/np/RAkIkmSiwDT-bgYZhGtknPhpkHsJcx0Q3nP0u8OyO_fZ4", "http://www.nanopub.org/nschema#hasAssertion": [ { "@id": "https://w3id.org/np/RAkIkmSiwDT-bgYZhGtknPhpkHsJcx0Q3nP0u8OyO_fZ4/assertion" } ], "http://www.nanopub.org/nschema#hasProvenance": [ { "@id": "https://w3id.org/np/RAkIkmSiwDT-bgYZhGtknPhpkHsJcx0Q3nP0u8OyO_fZ4/provenance" } ], "http://www.nanopub.org/nschema#hasPublicationInfo": [ { "@id": "https://w3id.org/np/RAkIkmSiwDT-bgYZhGtknPhpkHsJcx0Q3nP0u8OyO_fZ4/pubinfo" } ], "@type": [ "http://www.nanopub.org/nschema#Nanopublication" ] } ] } ]