List space observers
created: 2026-08-25T11:17:52Z
creator: Tobias Kuhn
license: https://creativecommons.org/licenses/by/4.0/
embeds: List space observers
type: Nanopublication
has assertion: assertion
has provenance: provenance
has publication info: pubinfo

sig
has algorithm: RSA
signed by: Tobias Kuhn

List space observers
type: grlc-query
description: Lists the observer-tier members of a given space (highest validated tier is observer). Reads the materialized tier directly off each validated gen:RoleInstantiation (npa:hasRoleType) in the current space state and excludes anyone holding a higher tier; no role-declaration re-derivation. IRI-keyed by npa:forSpace (param space).
license: LICENSE-2.0
endpoint: spaces
sparql: prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> prefix dct: <http://purl.org/dc/terms/> prefix np: <http://www.nanopub.org/nschema#> prefix npa: <http://purl.org/nanopub/admin/> prefix gen: <https://w3id.org/kpxl/gen/terms/> prefix schema: <http://schema.org/> select ?user ?role_assignments_multi_iri ?role_assignments_label_multi (?user as ?revokeAgent) where { { select ?user (max(?higher) as ?maxHigher) (group_concat(?latestNp; separator=" ") as ?role_assignments_multi_iri) (group_concat(?roleLabel; separator="\n") as ?role_assignments_label_multi) where { { select ?user ?role (max(?higher0) as ?higher) (sample(?roleLabel0) as ?roleLabel) (strafter(max(concat(coalesce(str(?dateNp),""), " ", str(?grantNp))), " ") as ?latestNp) where { values ?_space_multi_iri {} graph npa:graph { npa:thisRepo npa:hasCurrentSpaceState ?g . } graph ?g { ?ri a gen:RoleInstantiation ; npa:forSpace ?_space_multi_iri ; npa:forAgent ?user ; npa:viaNanopub ?grantNp ; npa:hasRoleType ?rt . } bind(if(?rt=gen:ObserverRole,0,1) as ?higher0) optional { graph npa:graph { ?grantNp dct:created ?dateNp } } optional { graph ?g { ?ri gen:hasRole ?role . } graph npa:spacesGraph { ?rd2 npa:role ?role ; npa:viaNanopub ?roleNp . } graph npa:graph { ?roleNp np:hasAssertion ?role_a . } optional { graph ?role_a { ?role schema:name ?rl } } } bind(coalesce(?rl,"role") as ?roleLabel0) } group by ?user ?role } } group by ?user having (max(?higher) = 0) } } order by ?user