2b:null 2c:["$","title",null,{"children":"dydra-2020-Q3 | James Anderson | Observable"}] 31:Te83,html`

11a855ea099275ea2e6b4a7921de038729e73397: application/json encodes results as a list of objects
c02af087bf474f7547d0f878f90028a391e443fc... 2047042062315d368d54b1b6009a756657767355: simplify access to term string and repository databases to use static environments and to reuse rather than nest transactions
a8adffd7e645a2d1f55002fc8cd133843cc47ba6: mediate declared dataset graphs from view query through to internal federated view processing
1fc3cb293c87493638701c46912347bc47526bd8: retain update transaction identifer for use in provenance record
95da580657752bd9adb0e154e3929aad2e5bf5fb: report conflicing write requests as 400's
bf670b550975e89dfdd11fd0674ce9fcaa697c0c... 0f62d11305d567663892843343f97add763056c9: support n3 formulae with sparql* as a special case. (see https://observablehq.com/d/7f9629bf197ebf02)
5975778778bec08ac32cb11c70da1cfdea3545b8: correctly order federation join clauses (nexperia#230)
a9b59d7eac62692a2068a6b327be7207b640131c: institute uniformly liberal CORS headers for all SPARQL and GSP requests in order to support browser preflight requests
1000429df47a2f812c238dba56f17f041a0b32e0: correct comparison logic for successive short strings, for example while sorting
3f86b37f6c5993ed9bea998c144fccb52be8efff: api resources for view management
0c056d78ccc66b2b21fe5ed7336db06e7599543f: reorder decoding steps to decompress earlier, in order to permit content encoding for more media types
2c9494dd446e11b78ab344a2f2822bd5294a4d8e: tentative free-text support based on postgres indices
73fc9017a11c46a14712a8a3941fdb775bcb2fa2... 32aa6523f4df273c35b3a393b0906faa71762b9b: implement direct to repository access for terms and strings to eliminate store mediation
d15d4759038d5a4f7e8a15980b03ec70d89b946b: Add logic to execute views based on file-system notification for repository changes
1a2cd5d8e3788189fbf4efd7ad0e972c8a79a09c: support csv import with tarql process control through views
c92ff55c3b94aedff471a27526d0e7d28d5ad510: correct encoding process to include strings from intervening transactions.
b763d018ac78f5d25882fe3ec61a91f834f486f0: correct duration arithmetic to truncate the day component
70415f609a882f751b73502ec5d3c9fa128405dc: support json for application/sparql-query responses.
0390fb5d98a1f21284741b217d0e8072c7a2bc18: implement api resources for sparql views
8747abb213ec36546f94f63749c8dd0a2dbf5de9: terminate respectve task should its connections fail
992e01f96d8ede2ef541816f3abde815ce8f990a: guard json-ld encoding for cases where a type term is not bound
e78dcab0fcfb631dd140660ec2d97353fc58d5da: permit both string and keyword json member names
afa8676e3b053bfc0056166562e9bdfab631ac83: support hdt repository storage for isolated sparql processing and limited result media types
c00308cba263e7f15f2400d2e9fe46c0860e6911: temporal constraint interpretation for revisioned repositories
9c434a0567a3688859772114ee1921ccc3b3b101: support asynchronous authentication
219ba5a069103e8f2bf0a5658f2416318f972902: support websocket access for response streams

`32:[] 2f:{"id":"7cbae4e4dbf03c2d","slug":"dydra-2020-q3","title":"dydra-2020-Q3","thumbnail":"e9c9f7c689e8679fdce9d219144734367c2c84edd5ad55681cab8c1d86d03a33","access_level":"public","create_time":"$D2020-08-11T20:44:36.405Z","update_time":"$D2021-02-20T04:34:48.275Z","view_time":null,"first_public_time":"$D2020-08-26T10:03:32.956Z","fork":false,"stars":0,"starred":false,"owner":{"type":"team","id":"b452fd69977f5701","login":"lomoramic","name":"James Anderson","avatar_url":"https://avatars-next.observableusercontent.com/dc520bbc733259f2913522cf1d50607777b98a3083f290a6f182534561896497","tier":"starter_2024"},"version":292,"publish_version":292,"role":null,"authored":false,"authors":[{"type":"individual","id":"987c90ad70c449c1","login":"lomoramic","name":"James Anderson","avatar_url":"https://avatars-next.observableusercontent.com/dc520bbc733259f2913522cf1d50607777b98a3083f290a6f182534561896497","tier":null}],"members":[{"type":"individual","id":"987c90ad70c449c1","login":"lomoramic","name":"James Anderson","avatar_url":"https://avatars-next.observableusercontent.com/dc520bbc733259f2913522cf1d50607777b98a3083f290a6f182534561896497","tier":null,"role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"subscribed":null,"forks":1,"collection":{"id":"d0923baaab8fe4c2","slug":"release-notes","title":"release notes","owner":{"id":"b452fd69977f5701","login":"lomoramic","name":"James Anderson"}},"type":"notebook","body":{"title":"dydra-2020-Q3","cells":[{"id":0,"value":"md`# dydra-2020-Q3\n\nThis release includes numerous improvements to SPARQL processing capabilities and to site administration:\n\n- [media type handling](#media-types)\n- [csv/tsv encoding](#csv-tsv)\n- [resource adminstration](#resource-administration)\n- [tarql views](#tarql)\n- [asynchronous authentication](#asynchronous-authentication)\n- [n3 formulae](#n3-formulae)\n- [gzip content encoding](#gzip-encoding)\n- [GSP response changes](#gsp-responses)\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":4,"value":"md`## media types\n\nResponse media type encodings have been revised to distinguish result variants more clearly between\n\n- application/json\n- application/sparql-results+json\n\nand to permit both of them for graph results.\n\nNote, in addition, that there is no distinction made between \\`application/sparql-update\\` and \\`application/sparql-query\\`.\nEither is acceptable for both query and update expressions.\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":5,"value":"md`### application/sparql-results+json\n\nThis standard media type for SPARQL results includes a header which indicate the dimensions and nests the result field as \\`results.bindings\\`\n\\`\\`\\`\n${JSON.stringify(applicationSparqlResultsJson, null, 1)}\n\\`\\`\\`\n\n`\n","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":272,"value":"mdfn`## csv tsv\nThe result and graph encoding for csv and tsv media types have been revised to more closely follow the [recommendation](https://www.w3.org/TR/sparql11-results-csv-tsv/).\nThis includes the double-quote delimiters, which now appear around all strings and typed literals, and the string content escaping, which is nos limited to the specified characters only.\n`","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":42,"value":"md`\n### application/json\n\nIf the simple JSON media type is specified for a SPARQL query, the result document is just an array of object with compact fields.\nThis representation is frequently simpler for a browser application to manipulate.\n\\`\\`\\`\n${JSON.stringify(applicationJson, null, 1)}\n\\`\\`\\`\n`\n","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":58,"value":"mdfn`## resource administration\n\nThree resources are available in the \\`/system\\` realm[^host] to manage site resources:\n\n- [accounts](#manage-accounts)\n- [repositories](#manage-repositories)\n- [views](#manage-views)\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":231,"value":"md`\n### manage accounts\n- POST /system/accounts/\nSends a JSON specification for a new account.\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":228,"value":"md`\n### manage repositories\n- POST /system/accounts/_account_/repositories/\nSends a JSON specification for a new repository.\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":128,"value":"md`### manage views\n\nViews are identified by service resources which extend a repository resource with the view name.\n\nA \\`GET\\` request which accepts a query media type yields the view query in response:\n\\`\\`\\`\nGET(\"openrdf-sesame/mem-rdf/all\", \n {\"Accept\": \"application/sparql-query\"})\n=\n${await GET(\"/test/foaf/all\", {\"Accept\": \"application/sparql-query\"})}\n\\`\\`\\` \n\na \\`PUT\\` creates or modifies the designated view:\n\\`\\`\\`\nPUT(\"openrdf-sesame/mem-rdf/all\", \n \"select (count(*) as ?c) where { {?s ?p ?o} union { graph ?g {?s ?p ?o} } }\",\n {\"Accept\": \"application/sparql-query\"})\n\\`\\`\\` \n\nWhile the standard \\`GET\\` request which accepts SPARQL results yields such a response, yields the response data field:\n\\`\\`\\`\nGET(\"openrdf-sesame/mem-rdf/all\", \n {\"Accept\": \"application/sparql-results+json\"})\n=\n${JSON.stringify(await GET(\"/test/foaf/all\", {\"Accept\": \"application/sparql-results+json\"}),null,1)}\n\\`\\`\\` \n\n\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":167,"value":"md`## tarql\n\nA view which expresses a [TARQL](https://tarql.github.io/) query can be used as the target of a request with a CSV file as content. The TARQL expression should be a CONSTRUCT in which the WHERE clause is a subselect which establishes the variables.\nThe api tests include an [example](https://github.com/dydra/http-api-tests/blob/master/extensions/sparql-protocol/csv/tarql.sh).\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":170,"value":"mdfn`## asynchronous authentication\n\nAsynchronous requests are indicated by requests which specify the header \\`Accept-Asynchronous: notify\\` along with the headers[^async] to specify the response location and media type.\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":198,"value":"mdfn `## n3 formulae\n\nN3 formulae[^n3logic] [^n3raf] provide a means to refer to a set of statements as a term in another statement.\nAs a special case, a singleton set of just one statement, this allows references analogous to SPARQL*[^star].\n\nWe implement support for them by extending the BNF to replace\n\\`\\`\\`\nVarOrterm :: Var | GraphTerm\n\\`\\`\\`\nwith\n\\`\\`\\`\nVarOrTermOrGroup :: Var | GraphTerm | GroupTemplate\nGroupTemplate ::= ( '{' TriplesTemplate? '}' ) | ( '<<' SubjectVarOrTermOrGroup Verb ObjectVarOrTermOrGroup '>>' )\n\\`\\`\\`\nto permit \\`{ ... }\\` and \\`<< ... >>\\` where subject or object terms appear and interpret the expressions as content-addressible graphs, named according to the SHA1 hash of their canonicalized n-quads form.\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":246,"value":"md `## gzip encoding\nThe \\`Content-Encoding\\` request header is now interpreted for Graph Store Protocol for all content media types, not just for n-quad and n-triple content.\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":265,"value":"md `## GSP responses\n\nA \\`/service\\` request now returns a \\`404\\` response code if there is no content respective the indicated graph, as specified for [graph management operations](https://www.w3.org/TR/2013/REC-sparql11-http-rdf-update-20130321/#status-codes).\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":68,"value":"mdfn`## chronological release log\n\nIn addition to the new capabilities, the release integrates numerous corrections and improvements since 01.01.2019[^ids]:\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":71,"value":"$31","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":56,"value":"md`\n-------\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":151,"value":"viewof footnotes = footlist([\n {ref: 'host', text: `All examples are with reference to the configured host (${host}). Those which read are active, while those which require write access are illustrative only.`},\n {ref: 'ids', text: `the revision identifiers are arranged chronologically.`},\n {ref: 'async', text: \"see [api.dydra.com](http://api.dydra.com/graphstore/asynchronous.html)\"},\n {ref: 'n3logic', text: \"see [N3 Logic](https://www.w3.org/DesignIssues/Notation3.html)\"},\n {ref: 'n3raf', text: \"see [Rules and Formulae](https://www.w3.org/2000/10/swap/doc/Rules)\"},\n {ref: 'star', text: \"see [SPARQL Star](https://blog.liu.se/olafhartig/2019/01/10/position-statement-rdf-star-and-sparql-star/)\"}\n ])","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":148,"value":"md`\n-------\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":7,"value":"applicationSparqlResultsJson = sparqlPost(\"select ?s ?p ?o where { ?s ?p ?o } limit 1\",\n {\"Content-Type\": \"application/sparql-query\",\n \"Accept\": \"application/sparql-results+json\"});","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":10,"value":"applicationJson= sparqlPost(\"select ?s ?p ?o where { ?s ?p ?o } limit 1\",\n {\"Content-Type\": \"application/sparql-query\",\n \"Accept\": \"application/json\"});","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":24,"value":"import { resourceAPI, protocolAPI } from \"@datagenous/resource-protocol-library\"","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":25,"value":"sparqlPost = resourceAPI(resource, \"POST\");","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":118,"value":"GET = protocolAPI(host, \"GET\");","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":63,"value":"sparqlGet = resourceAPI(resource, \"GET\");","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":65,"value":"sparqlPUT = resourceAPI(resource, \"PUT\");","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":27,"value":"resource = \"https://nl4.dydra.com/jhacker/foaf\"","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":123,"value":"host = \"nl4.dydra.com\"","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":145,"value":"import {mdfn, footlist, footnoteCSS} with { footnotes as footnotes } from '@formsandlines/linked-markdown-style-footnotes-with-tooltips'\n","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":192,"value":"footnoteCSS","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"}],"files":"$W32","stdlib":"1","titling":"auto"}} 30:"$2f:body"