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<!DOCTYPE html>
<html
about="https://solidproject.org/TR/acp#"
typeof="schema:Article doap:Specification"
prefix="
acp: http://www.w3.org/ns/solid/acp#
bibo: http://purl.org/ontology/bibo/
cito: http://purl.org/spar/cito/
dc: http://purl.org/dc/terms/
doap: http://usefulinc.com/ns/doap#
owl: http://www.w3.org/2002/07/owl#
rdf: http://www.w3.org/1999/02/22-rdf-syntax-ns#
rdfs: http://www.w3.org/2000/01/rdf-schema#
schema: http://schema.org/
vann: http://purl.org/vocab/vann/
xsd: http://www.w3.org/2001/XMLSchema#"
dir="ltr"
lang="en"
>
<head>
<meta charset="utf-8" />
<meta content="width=device-width, initial-scale=1" name="viewport" />
<link href="https://solidproject.org/TR/solid.svg" rel="icon">
<title>Access Control Policy (ACP)</title>
<link
rel="stylesheet"
href="https://www.w3.org/StyleSheets/TR/2016/base.css"
media="all"
/>
<link rel="stylesheet" href="./2022/acp-main-20220518.css" media="all" />
<link rel="stylesheet" href="./2022/acp-code-20220518.css" media="all" />
</head>
<body vocab="https://solidproject.org/TR/acp#">
<header class="head">
<a class="logo" href="https://solidproject.org/"
><img alt="Solid" src="solid.svg" width="72" height="66"
/></a>
<h1 property="dc:title">Access Control Policy (ACP)</h1>
<h2>
<span property="rdfs:comment">Version 0.9.0</span>,
<time property="dc:issued" datetime="2022-05-18">2022-05-18</time>
</h2>
<details open="">
<summary>More details about this document</summary>
<dl>
<dt>This version</dt>
<dd>
<a href="https://solidproject.org/TR/2022/acp-20220518">https://solidproject.org/TR/2022/acp-20220518</a>
</dd>
<dt>Latest version</dt>
<dd>
<a href="https://solidproject.org/TR/acp">https://solidproject.org/TR/acp</a>
</dd>
<dt>Editor's draft</dt>
<dd>
<a href="https://solid.github.io/authorization-panel/acp-specification">https://solid.github.io/authorization-panel/acp-specification</a>
</dd>
<dt>Source repository</dt>
<dd>
<a href="https://github.com/solid/authorization-panel">https://github.com/solid/authorization-panel</a>
</dd>
<dt>Issue tracking</dt>
<dd>
<a href="https://github.com/solid/authorization-panel/issues">https://github.com/solid/authorization-panel/issues</a>
</dd>
<dt>License</dt>
<dd>
<a href="http://purl.org/NET/rdflicense/MIT1.0">MIT License</a>
</dd>
<dt>Editors</dt>
<dd>
<ul>
<li rel="schema:creator schema:author">
<span
about="https://id.inrupt.com/matthieu"
typeof="schema:Person"
>
<a
rel="schema:url"
href="https://github.com/matthieubosquet/"
>
<span
about="https://id.inrupt.com/matthieu"
property="schema:name"
>
<span property="schema:givenName">Matthieu</span>
<span property="schema:familyName">Bosquet</span>
</span>
</a>
</span>
</li>
</ul>
</dd>
</dl>
</details>
<p id="copyright" class="copyright">
<span property="dc:license">MIT License.</span> Copyright ©
<span property="dc:dateCopyrighted">2022</span>
<a
rel="dc:rightsHolder"
href="http://www.w3.org/community/solid/"
>W3C Solid Community Group</a
>.
</p>
</header>
<section
datatype="rdf:HTML"
typeof="bibo:Chapter"
resource=":abstract"
property="bibo:hasPart"
>
<h2 id="abstract">Abstract</h2>
<p>
This document defines the
<span about="acp:" property="rdfs:label"
>Access Control Policy Language (ACP)</span
>.
<span about="acp:" typeof="owl:Ontology" property="rdfs:comment"
>ACP is a language for describing, controlling, and granting access to
resources.</span
>
</p>
</section>
<section
datatype="rdf:HTML"
typeof="bibo:Chapter"
resource=":status-of-this-document"
property="bibo:hasPart"
>
<h2 id="status-of-this-document">Status of this document</h2>
<p>
This section describes the status of this document at the time of its
publication.
</p>
<p>
This document was published by the
<a href="https://www.w3.org/community/solid/">Solid Community Group</a>
as an Editor's Draft. The sections that have been incorporated have
been reviewed following the
<a href="https://github.com/solid/process">Solid process</a>. However,
the information in this document is still subject to change. You are
invited to
<a href="https://github.com/solid/specification/issues">contribute</a>
any feedback, comments, or questions you might have.
</p>
<p>
Publication as an Editor's Draft does not imply endorsement by the
W3C Membership. This is a draft document and may be updated, replaced or
obsoleted by other documents at any time. It is inappropriate to cite
this document as other than work in progress.
</p>
<p>
This document was produced by a group operating under the
<a href="https://www.w3.org/community/about/agreements/cla/"
>W3C Community Contributor License Agreement (CLA)</a
>. A human-readable
<a href="https://www.w3.org/community/about/agreements/cla-deed/"
>summary</a
>
is available.
</p>
</section>
<nav id="toc">
<h2 id="table-of-contents">Table of Contents</h2>
<ol class="toc">
<li class="tocline">
<a href="#abstract" class="tocxref">Abstract</a>
</li>
<li class="tocline">
<a href="#status-of-this-document" class="tocxref"
>Status of this document</a
>
</li>
<li class="tocline">
<a href="#introduction" class="tocxref"
><span class="secno">1</span>Introduction</a
>
<ol class="toc">
<li class="tocline">
<a href="#rdf-terminology" class="tocxref"
><span class="secno">1.1</span>RDF terminology</a
>
</li>
</ol>
<ol class="toc">
<li class="tocline">
<a href="#namespaces" class="tocxref"
><span class="secno">1.2</span>RDF vocabularies and namespace
IRIs</a
>
</li>
</ol>
<ol class="toc">
<li class="tocline">
<a href="#acp-terminology" class="tocxref"
><span class="secno">1.3</span>ACP terminology</a
>
</li>
</ol>
<ol class="toc">
<li class="tocline">
<a href="#example-graphs" class="tocxref"
><span class="secno">1.4</span>Example graphs</a
>
</li>
</ol>
<ol class="toc">
<li class="tocline">
<a href="#data-model" class="tocxref"
><span class="secno">1.5</span>Data model</a
>
</li>
</ol>
<ol class="toc">
<li class="tocline">
<a href="#ontology" class="tocxref"
><span class="secno">1.6</span>Ontology</a
>
</li>
</ol>
</li>
<li class="tocline">
<a href="#conformance" class="tocxref"
><span class="secno">2</span>Conformance</a
>
</li>
<li class="tocline">
<a href="#context-graph" class="tocxref"
><span class="secno">3</span>Context Graph</a
>
<ol class="toc">
<li class="tocline">
<a href="#context" class="tocxref"
><span class="secno">3.1</span>Context</a
>
<ol class="toc">
<li class="tocline">
<a href="#example-context" class="tocxref"
><span class="secno">3.1.1</span>Example Context</a
>
</li>
</ol>
</li>
</ol>
<ol class="toc">
<li class="tocline">
<a href="#context-extensibility" class="tocxref"
><span class="secno">3.2</span>Context extensibility</a
>
<ol class="toc">
<li class="tocline">
<a href="#example-context-extension" class="tocxref"
><span class="secno">3.2.1</span>Example Context
extension</a
>
</li>
</ol>
</li>
</ol>
</li>
<li class="tocline">
<a href="#authorization-graph" class="tocxref"
><span class="secno">4</span>Authorization Graph</a
>
<ol class="toc">
<li class="tocline">
<a href="#access-control-resource" class="tocxref"
><span class="secno">4.1</span>Access Control Resource</a
>
<ol class="toc">
<li class="tocline">
<a href="#example-access-control-resource" class="tocxref"
><span class="secno">4.1.1</span>Example Access Control
Resource</a
>
</li>
</ol>
</li>
</ol>
<ol class="toc">
<li class="tocline">
<a href="#access-control" class="tocxref"
><span class="secno">4.2</span>Access Control</a
>
<ol class="toc">
<li class="tocline">
<a href="#example-access-control" class="tocxref"
><span class="secno">4.2.1</span>Example Access Control</a
>
</li>
</ol>
</li>
</ol>
<ol class="toc">
<li class="tocline">
<a href="#policy" class="tocxref"
><span class="secno">4.3</span>Policy</a
>
<ol class="toc">
<li class="tocline">
<a href="#example-policy" class="tocxref"
><span class="secno">4.3.1</span>Example Policy</a
>
</li>
</ol>
</li>
</ol>
<ol class="toc">
<li class="tocline">
<a href="#matcher" class="tocxref"
><span class="secno">4.4</span>Matcher</a
>
<ol class="toc">
<li class="tocline">
<a href="#example-matcher" class="tocxref"
><span class="secno">4.4.1</span>Example Matcher</a
>
</li>
</ol>
</li>
</ol>
<ol class="toc">
<li class="tocline">
<a href="#matcher-extensibility" class="tocxref"
><span class="secno">4.5</span>Matcher extensibility</a
>
<ol class="toc">
<li class="tocline">
<a href="#example-matcher-extension" class="tocxref"
><span class="secno">4.5.1</span>Example Matcher
extension</a
>
</li>
</ol>
</li>
</ol>
</li>
<li class="tocline">
<a href="#access-grant-graph" class="tocxref"
><span class="secno">5</span>Access Grant Graph</a
>
<ol class="toc">
<li class="tocline">
<a href="#access-grant" class="tocxref"
><span class="secno">5.1</span>Access Grant</a
>
<ol class="toc">
<li class="tocline">
<a href="#example-access-grant" class="tocxref"
><span class="secno">5.1.1</span>Example Access Grant</a
>
</li>
</ol>
</li>
</ol>
<ol class="toc">
<li class="tocline">
<a href="#access-mode-extensibility" class="tocxref"
><span class="secno">5.2</span>Access Mode extensibility</a
>
<ol class="toc">
<li class="tocline">
<a href="#example-access-mode" class="tocxref"
><span class="secno">5.2.1</span>Example Access Mode</a
>
</li>
</ol>
</li>
</ol>
</li>
<li class="tocline">
<a href="#access-control-resolution" class="tocxref"
><span class="secno">6</span>Access Control resolution</a
>
<ol class="toc">
<li class="tocline">
<a href="#resolved-access-control" class="tocxref"
><span class="secno">6.1</span>Resolved Access Control</a
>
<ol class="toc">
<li class="tocline">
<a href="#resolved-access-control-pseudocode" class="tocxref"
><span class="secno">6.1.1</span>Resolved Access Control
pseudocode</a
>
</li>
</ol>
</li>
</ol>
<ol class="toc">
<li class="tocline">
<a href="#effective-policies" class="tocxref"
><span class="secno">6.2</span>Effective Policies</a
>
<ol class="toc">
<li class="tocline">
<a href="#effective-policies-example" class="tocxref"
><span class="secno">6.2.1</span>Effective Policies
example</a
>
</li>
</ol>
<ol class="toc">
<li class="tocline">
<a href="#effective-policies-pseudocode" class="tocxref"
><span class="secno">6.2.2</span>Effective Policies
pseudocode</a
>
</li>
</ol>
</li>
</ol>
<ol class="toc">
<li class="tocline">
<a href="#granted-access-modes" class="tocxref"
><span class="secno">6.3</span>Granted Access Modes</a
>
<ol class="toc">
<li class="tocline">
<a href="#granted-access-modes-example" class="tocxref"
><span class="secno">6.3.1</span>Granted Access Modes
example</a
>
</li>
</ol>
<ol class="toc">
<li class="tocline">
<a href="#granted-access-modes-pseudocode" class="tocxref"
><span class="secno">6.3.2</span>Granted Access Modes
pseudocode</a
>
</li>
</ol>
</li>
</ol>
<ol class="toc">
<li class="tocline">
<a href="#satisfied-policy" class="tocxref"
><span class="secno">6.4</span>Satisfied Policy</a
>
<ol class="toc">
<li class="tocline">
<a href="#satisfied-policy-example" class="tocxref"
><span class="secno">6.4.1</span>Satisfied Policy example</a
>
</li>
</ol>
<ol class="toc">
<li class="tocline">
<a href="#satisfied-policy-pseudocode" class="tocxref"
><span class="secno">6.4.2</span>Satisfied Policy
pseudocode</a
>
</li>
</ol>
</li>
</ol>
<ol class="toc">
<li class="tocline">
<a href="#satisfied-matcher" class="tocxref"
><span class="secno">6.5</span>Satisfied Matcher</a
>
<ol class="toc">
<li class="tocline">
<a href="#satisfied-matcher-example" class="tocxref"
><span class="secno">6.5.1</span>Satisfied Matcher
example</a
>
</li>
</ol>
<ol class="toc">
<li class="tocline">
<a href="#satisfied-matcher-pseudocode" class="tocxref"
><span class="secno">6.5.2</span>Satisfied Matcher
pseudocode</a
>
</li>
</ol>
</li>
</ol>
</li>
<li class="tocline">
<a href="#server-implementation" class="tocxref"
><span class="secno">7</span>Server implementation</a
>
<ol class="toc">
<li class="tocline">
<a href="#conforming-resource-server" class="tocxref"
><span class="secno">7.1</span>Conforming resource server</a
>
</li>
</ol>
<ol class="toc">
<li class="tocline">
<a href="#conforming-acp-server" class="tocxref"
><span class="secno">7.2</span>Conforming ACP server</a
>
</li>
</ol>
</li>
<li class="tocline">
<a href="#acknowledgements" class="tocxref">Acknowledgements</a>
</li>
<li class="tocline">
<a href="#references" class="tocxref">References</a>
<ol class="toc">
<li class="tocline">
<a href="#normative-references" class="tocxref"
>Normative references</a
>
</li>
</ol>
<ol class="toc">
<li class="tocline">
<a href="#informative-references" class="tocxref"
>Informative references</a
>
</li>
</ol>
</li>
</ol>
</nav>
<main>
<section
datatype="rdf:HTML"
typeof="bibo:Chapter"
resource=":introduction"
property="bibo:hasPart"
>
<h2 class="heading" id="introduction">
<span class="secno">1. </span><span class="content">Introduction</span
><a class="self-link" href="#introduction"></a>
</h2>
<p>
This section introduces ACP with an overview of key terminology, an
explanation of the conventions used in this document, example graphs
to illustrate basic concepts of resource access description and
validation, a diagram representing the main elements of the ACP data
model, and an RDF representation of the ACP ontology.
</p>
<section
datatype="rdf:HTML"
typeof="bibo:Chapter"
resource=":rdf-terminology"
property="bibo:hasPart"
>
<h3 class="heading" id="rdf-terminology">
<span class="secno">1.1. </span
><span class="content">RDF terminology</span
><a class="self-link" href="#rdf-terminology"></a>
</h3>
<p>
This document uses the terms
<a href="http://www.w3.org/TR/rdf11-concepts/#dfn-resource"
><dfn id="rdf-resource">resource</dfn></a
>,
<a href="https://www.w3.org/TR/rdf11-concepts/#dfn-property"
><dfn id="rdf-property">property</dfn></a
>,
<a href="https://www.w3.org/TR/rdf11-concepts/#dfn-rdf-vocabulary"
><dfn id="rdf-vocabulary">RDF vocabulary</dfn></a
>,
<a href="https://www.w3.org/TR/rdf11-concepts/#dfn-namespace"
><dfn id="rdf-namespace">namespace</dfn></a
>,
<a href="https://www.w3.org/TR/rdf11-concepts/#dfn-namespace-iri"
><dfn id="rdf-namespace-iri">namespace IRI</dfn></a
>,
<a href="https://www.w3.org/TR/rdf11-concepts/#dfn-namespace-prefix"
><dfn id="rdf-namespace-prefix">namespace prefix</dfn></a
>,
<a href="http://www.w3.org/TR/rdf11-concepts/#dfn-rdf-graph"
><dfn id="rdf-graph">graph</dfn></a
>,
<a href="http://www.w3.org/TR/rdf11-concepts/#dfn-iri"
><dfn id="rdf-iri">IRI</dfn></a
>,
<a href="http://www.w3.org/TR/rdf11-concepts/#dfn-literal"
><dfn id="rdf-literal">literal</dfn></a
>,
<a href="http://www.w3.org/TR/rdf11-concepts/#dfn-blank-node"
><dfn id="rdf-blank-node">blank node</dfn></a
>,
<a href="http://www.w3.org/TR/rdf11-concepts/#dfn-node"
><dfn id="rdf-node">node</dfn></a
>,
<a href="http://www.w3.org/TR/rdf11-concepts/#dfn-rdf-term"
><dfn id="rdf-term">term</dfn></a
>,
<a href="https://www.w3.org/TR/rdf11-concepts/#dfn-iri-equality"
><dfn id="rdf-iri-eqality">IRI equality</dfn></a
>
and
<a
href="https://www.w3.org/TR/rdf11-concepts/#dfn-literal-term-equality"
><dfn id="rdf-literal-term-eqality">literal term equality</dfn></a
>
as defined in RDF 1.1 Concepts and Abstract Syntax
<cite
><a class="bibref" href="#rdf11-concepts">RDF11 CONCEPTS</a></cite
>.
</p>
</section>
<section
datatype="rdf:HTML"
typeof="bibo:Chapter"
resource=":namespaces"
property="bibo:hasPart"
>
<h3 class="heading" id="namespaces">
<span class="secno">1.2. </span
><span class="content">RDF vocabularies and namespace IRIs</span
><a class="self-link" href="#namespaces"></a>
</h3>
<p>
This document uses the following RDF vocabularies and corresponding
namespace prefix bindings:
</p>
<table>
<thead>
<tr>
<th>Prefix</th>
<th>Namespace</th>
</tr>
</thead>
<tbody>
<tr about="acp:">
<td>
<code property="vann:preferredNamespacePrefix">acp:</code>
</td>
<td>
<code
><a
href="http://www.w3.org/ns/solid/acp#"
property="vann:preferredNamespaceUri"
>http://www.w3.org/ns/solid/acp#</a
></code
>
</td>
</tr>
<tr>
<td><code>acl:</code></td>
<td>
<code
><a href="http://www.w3.org/ns/auth/acl#"
>http://www.w3.org/ns/auth/acl#</a
></code
>
</td>
</tr>
<tr>
<td><code>ex:</code></td>
<td>
<code
><a href="https://example.org/"
>https://example.org/</a
></code
>
</td>
</tr>
<tr>
<td><code>ldp:</code></td>
<td>
<code
><a href="http://www.w3.org/ns/ldp#"
>http://www.w3.org/ns/ldp#</a
></code
>
</td>
</tr>
<tr>
<td><code>rdf:</code></td>
<td>
<code
><a href="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
>http://www.w3.org/1999/02/22-rdf-syntax-ns#</a
></code
>
</td>
</tr>
<tr>
<td><code>rdfs:</code></td>
<td>
<code
><a href="http://www.w3.org/2000/01/rdf-schema#"
>http://www.w3.org/2000/01/rdf-schema#</a
></code
>
</td>
</tr>
<tr>
<td><code>owl:</code></td>
<td>
<code
><a href="http://www.w3.org/2002/07/owl#"
>http://www.w3.org/2002/07/owl#</a
></code
>
</td>
</tr>
</tbody>
</table>
</section>
<section
datatype="rdf:HTML"
typeof="bibo:Chapter"
resource=":acp-terminology"
property="bibo:hasPart"
>
<h3 class="heading" id="acp-terminology">
<span class="secno">1.3. </span
><span class="content">ACP terminology</span
><a class="self-link" href="#acp-terminology"></a>
</h3>
<p><em>This section is non-normative.</em></p>
<dl>
<dt id="acp-terminology-context-graph">Context graph</dt>
<dd>
<a href="#context-graph">Context graphs</a> describe the
attributes of resource access instances. An access request's
attributes can be matched to sets of conditions defined in the
form of an
<a href="#acp-terminology-authorization-graph"
>authorization graph</a
>
in order to determine Access Modes granted over resources.
</dd>
<dt id="acp-terminology-authorization-graph">
Authorization graph
</dt>
<dd>
<a href="#authorization-graph">Authorization graphs</a>
authoritatively define the conditions for granting Access Modes
over resources through Access Control Resources, Access Controls,
Policies and Matchers. The result of applying an authorization
graph to a described instance of resource access is an
<a href="#acp-terminology-access-grant-graph"
>access grant graph</a
>.
</dd>
<dt id="acp-terminology-access-grant-graph">Access grant graph</dt>
<dd>
<a href="#access-grant-graph">Access grant graphs</a> describe
sets of Access Modes granted over resources in the context of
resource access requests. Access grants are the result of
<a href="#acp-terminology-access-control-resolution"
>access control resolution</a
>.
</dd>
<dt id="acp-terminology-access-control-resolution">
Access control resolution
</dt>
<dd>
<a href="#access-control-resolution">Access control resolution</a>
describes the algorithm used to apply an authorization graph to a
context graph in order to obtain an access grant graph.
</dd>
</dl>
</section>
<section
datatype="rdf:HTML"
typeof="bibo:Chapter"
resource=":example-graphs"
property="bibo:hasPart"
>
<h3 class="heading" id="example-graphs">
<span class="secno">1.4. </span
><span class="content">Example graphs</span
><a class="self-link" href="#example-graphs"></a>
</h3>
<p><em>This section is non-normative.</em></p>
<p>
Throughout this document, color-coded boxes contain the RDF
representation of example context graphs, authorization graphs, and
access grant graphs serialized in
<a href="https://www.w3.org/TR/turtle/"
><dfn id="turtle-syntax">turtle</dfn></a
>
<cite><a class="bibref" href="#turtle">RDF11-TURTLE</a></cite
>. Those graphs use a mix of IRIs and blank nodes where applicable
to better show the range of possible representations.
</p>
<p>
The following example
<a href="#acp-terminology-context-graph">context graph</a> describes
an instance of resource access and could be translated as:
<em
>"Bob is trying to read resource X using client application Y with
their identity asserted by identity provider Z."</em
>.
</p>
<pre id="example-context-graph" class="example example-context-graph">
# This box contains a context graph
# It describes an instance of resource access
[]
acp:target ex:resourceX ;
acp:agent ex:Bob ;
acp:mode acl:Read ;
acp:client ex:clientApplicationY ;
acp:issuer ex:identityProviderZ .
</pre
>
<p>
The following example
<a href="#acp-terminology-authorization-graph"
>authorization graph</a
>
defines the conditions of access to resource X and could be
translated as:
<em
>"Access to resource X is mandated by one Access Control that
applies one Policy which allows access mode
<code>acl:Read</code> when Alice or Bob are the agent trying to
access resource X."</em
>.
</p>
<pre
id="example-authorization-graph"
class="example example-authorization-graph"
>
# This box contains an authorization graph
# It describes the conditions required for accessing a resource
[]
a acp:AccessControlResource ;
acp:resource ex:resourceX ;
acp:accessControl [
a acp:AccessControl ;
acp:apply [
a acp:Policy ;
acp:allow acl:Read ;
acp:anyOf [
a acp:Matcher ;
acp:agent ex:Alice, ex:Bob ;
]
]
] .
</pre
>
<p>
The following example
<a href="#acp-terminology-access-grant-graph">access grant graph</a>
is the result of
<a href="#acp-terminology-access-control-resolution">applying</a>
the previous example authorization graph which defines access to
resource X to the previous example context graph which describes a
read access request to target resource X. Bob is matched as the
context agent and since the policy allowing
<code>acl:Read</code> defines no further restrictions, it is
satisfied. The following access grant graph could be read as:
<em
>"The access mode <code>acl:Read</code> is granted to Bob who
requested read access to resource X using client application Y
with their identity asserted by identity provider Z."</em
>.
</p>
<pre
id="example-access-grant-graph"
class="example example-access-grant-graph"
>
# This box contains an access grant graph
# It describes in context the granted access over a resource
[]
acp:grant acl:Read ;
acp:context [
acp:agent ex:Bob ;
acp:target ex:resourceX ;
acp:mode acl:Read ;
acp:client ex:ClientApplicationY ;
acp:issuer ex:IdentityProviderZ ;
] .
</pre
>
</section>
<section
datatype="rdf:HTML"
typeof="bibo:Chapter"
resource=":data-model"
property="bibo:hasPart"
>
<h3 class="heading" id="data-model">
<span class="secno">1.5. </span
><span class="content">Data model</span
><a class="self-link" href="#data-model"></a>
</h3>
<p><em>This section is non-normative.</em></p>
<p>The following diagram illustrates the main elements of ACP.</p>
<img
alt="ACP Data Model"
src="./2022/acp-data-model-20220518.svg"
style="width: 100%"
/>
</section>
<section
datatype="rdf:HTML"
typeof="bibo:Chapter"
resource=":ontology"
property="bibo:hasPart"
>
<h3 class="heading" id="ontology">
<span class="secno">1.6. </span><span class="content">Ontology</span
><a class="self-link" href="#ontology"></a>
</h3>
<p>
All terms defined by the Access Control Policy Language are present
in an RDF representation of the
<a href="http://www.w3.org/ns/solid/acp#">ACP ontology serialized in turtle</a>.
</p>
</section>
</section>
<section
datatype="rdf:HTML"
typeof="bibo:Chapter"
resource=":conformance"
property="bibo:hasPart"
>
<h2 class="heading" id="conformance">
<span class="secno">2. </span><span class="content">Conformance</span
><a class="self-link" href="#conformance"></a>
</h2>
<p>
All assertions, diagrams, examples, pseudocode and notes are
non-normative, as are all sections explicitly marked non-normative.
Everything else is normative.
</p>
<p id="rfc2119-conformance">
The key words
<a href="https://datatracker.ietf.org/doc/html/rfc2119#section-1"
><dfn id="rfc2119-must">MUST</dfn></a
>,
<a href="https://datatracker.ietf.org/doc/html/rfc2119#section-2"
><dfn id="rfc2119-must-not">MUST NOT</dfn></a
>,
<a href="https://datatracker.ietf.org/doc/html/rfc2119#section-1"
><dfn id="rfc2119-required">REQUIRED</dfn></a
>,
<a href="https://datatracker.ietf.org/doc/html/rfc2119#section-1"
><dfn id="rfc2119-shall">SHALL</dfn></a
>,
<a href="https://datatracker.ietf.org/doc/html/rfc2119#section-2"
><dfn id="rfc2119-shall-not">SHALL NOT</dfn></a
>,
<a href="https://datatracker.ietf.org/doc/html/rfc2119#section-3"
><dfn id="rfc2119-should">SHOULD</dfn></a
>,
<a href="https://datatracker.ietf.org/doc/html/rfc2119#section-4"
><dfn id="rfc2119-should-not">SHOULD NOT</dfn></a
>,
<a href="https://datatracker.ietf.org/doc/html/rfc2119#section-3"
><dfn id="rfc2119-recommended">RECOMMENDED</dfn></a
>,
<a href="https://datatracker.ietf.org/doc/html/rfc2119#section-5"
><dfn id="rfc2119-may">MAY</dfn></a
>, and
<a href="https://datatracker.ietf.org/doc/html/rfc2119#section-5"
><dfn id="rfc2119-optional">OPTIONAL</dfn></a
>, are to be interpreted as defined in
<cite><a class="bibref" href="#rfc2119">RFC 2119</a></cite
>.
</p>
<p>
Only UPPERCASE usage of the key words defined in RFC 2119 have special
meanings, as per
<cite><a class="bibref" href="#rfc8174">RFC 8174</a></cite
>.
</p>
</section>
<section
datatype="rdf:HTML"
typeof="bibo:Chapter"
resource=":context-graph"