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narrative: classes #200
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riannella committed Jun 27, 2017
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Expand Up @@ -251,8 +251,8 @@ <h3>Agreement</h3>
</section>

<section id="asset">
<h3>Asset</h3>
<p>An Asset is a resource or a collection of resources that are the subject of a Rule. The Asset can be any form of identifiable resource, such as data/information, content/media, applications, or services. Furthermore, it can be used to represent other <code>Asset</code> classes that are needed to undertake the Policy expression, such as with a Duty. An Asset is referred to by the Permission and/or Prohibition, and also by the Duty.</p>
<h3>Asset Class</h3>
<p>An Asset class is a resource or a collection of resources that are the subject of a Rule. The Asset can be any form of identifiable resource, such as data/information, content/media, applications, or services. Furthermore, it can be used to represent other <code>Asset</code> classes that are needed to undertake the Policy expression, such as with a Duty. An Asset is referred to by the Permission and/or Prohibition, and also by the Duty.</p>

<p>The Asset class has the following subclass:</p>

Expand Down Expand Up @@ -377,11 +377,11 @@ <h3>Target Policy</h3>


<section id="party">
<h3>Party</h3>
<h3>Party Class </h3>

<p>A Party is an entity or a collection of entities that undertake functional roles in a Rule, such as a person, collection of people, organisation, or agent. An agent is a person or thing that takes an active role or produces a specified effect. The Party performs (or does not perform) Actions or has a function in a Duty (i.e., assigns the Party to the Rule by associating it with the function it plays in the Rule).</p>
<p>A Party Class is an entity or a collection of entities that undertake functional roles in a Rule, such as a person, collection of people, organisation, or agent. An agent is a person or thing that takes an active role or produces a specified effect. The Party performs (or does not perform) Actions or has a function in a Duty (i.e., assigns the Party to the Rule by associating it with the function it plays in the Rule).</p>

<p>The Party class has the following subclas:</p>
<p>The Party class has the following subclass:</p>
<ul>
<li><code>PartyCollection</code> - a Party that is a collection of entities. This indicates that all the entities in the collection will undertake the same functional role in the Rule.</li>
</ul>
Expand Down Expand Up @@ -524,10 +524,10 @@ <h3>Assigned Policy</h3>
</section>

<section id="action">
<h3>Action</h3>
<h3>Action Class</h3>


<p>An Action indicates an operation that can be applied to an Asset. An Action is associated with the Asset via the action property in a Rule.</p>
<p>An Action class indicates an operation that can be applied to an Asset. An Action is associated with the Asset via the action property in a Rule.</p>

<p>The Rule provides the specific interpretations of the Action. For example; an Action is <em>permitted</em> to be performed on the target Asset when related to a Permission. When related to a Prohibition, the Action indicates the operation that is <em>prohibited</em> to be performed on the target Asset. When related to a Duty, the Action indicates the agreed operation that is <em>obligatory</em> to be performed by a Party</p>

Expand Down Expand Up @@ -586,7 +586,7 @@ <h3>Action</h3>
</section>

<section id="rule">
<h3>Rule</h3>
<h3>Rule Class</h3>


<p>The Rule class is the parent of the Permission, Prohibition, and Duty classes. The Rule class represents the common characteristics of these three classes.
Expand Down Expand Up @@ -769,9 +769,9 @@ <h3>Duty</h3>
</section>

<section id="constraint">
<h3>Constraint</h3>
<h3>Constraint Class </h3>

<p>A Constraint is a boolean expression that refines the applicability of a Rule, or the context of a Party or Asset Collection. Constraints can be represented as <strong>Atomic Constraints</strong> or as <strong>Compound Constraints</strong>. A Compound Constraint will include existing Atomic Constraints as its left and right operands. The evaluation of a Constraint is treated as a <em>black box</em> from an external system with the outcome of this evaluation determinig if the Constraint has been <em>satisfied</em> or not.</p>
<p>A Constraint class is a boolean expression that refines the applicability of a Rule, or the context of a Party or Asset Collection. Constraints can be represented as <strong>Atomic Constraints</strong> or as <strong>Compound Constraints</strong>. A Compound Constraint will include existing Atomic Constraints as its left and right operands. The evaluation of a Constraint is treated as a <em>black box</em> from an external system with the outcome of this evaluation determinig if the Constraint has been <em>satisfied</em> or not.</p>

<p>ODRL Processors MUST check if a Constraint is satisfied at the time of processing the relevant Action, Asset, or Party. For a Rule, if the Constraint is satisfied then the action becomes effective for the enclosing Rule. For a Party/Asset Collection, if the Constraint is satisfied, then the (individual) Asset or Party becomes effective for the enclosing Rule.</p>

Expand Down Expand Up @@ -1057,9 +1057,9 @@ <h3>Party Constraint</h3>
<section id="composition">
<h4>Policy Rule Composition</h4>

<p>A Policy MAY contain multiple Rules, and each Rule MAY contain multiple Assets, Parties, Actions, Constraints, and Duties. A Policy MAY also contain Assets, Parties, and Actions at the Policy level, and these entities apply to all of the enclosing Rules in the Policy.</p>
<p>A Policy MAY be related to multiple Rules, and each Rule MAY be related to multiple Assets, Parties, Actions, Constraints, and Duties. A Policy MAY also be related to Assets, Parties, and Actions at the Policy level, and these relationships apply to all of the enclosing Rules in the Policy.</p>

<p>At the core level, an ODRL Rule would include one Asset, one or more Parties, one Action, and potentially one Constraint and/or Duty, as shown in the example below. This example shows the <em>atomic</em> level of a Policy where it is an irreducible Rule (that is, not able to be reduced or further simplified).</p>
<p>At the core level, an ODRL Rule would be related to one Asset, one or more Parties, one Action, and potentially one Constraint and/or Duty, as shown in the example below. This example shows the <em>atomic</em> level of a Policy where it is an irreducible Rule (that is, not able to be reduced or further simplified).</p>

<pre class="example hljs json">
{
Expand Down Expand Up @@ -1199,7 +1199,7 @@ <h4>Policy Metadata</h4>

<p>The processing model for Policies with the above provenance properties include:</p>
<ol>
<li>If a Policy contains the <code>dc:isReplacedBy</code> property, then a processor MUST consider the first Policy invalid and MUST retrieve and process the identified Policy.</li>
<li>If a Policy has the <code>dc:isReplacedBy</code> property, then a processor MUST consider the first Policy invalid and MUST retrieve and process the identified Policy.</li>
</ol>

<blockquote>
Expand Down Expand Up @@ -1316,7 +1316,7 @@ <h4>Policy Inheritance</h4>

<p>The processing model for ODRL Policy Inheritance includes:</p>
<ol>
<li>A (child) Policy with an <code>inheritFrom</code> property MUST first verify that the (parent) Policy does not contain the <code>inheritAllowed</code> property with the value <strong>false</strong>.</li>
<li>A (child) Policy with an <code>inheritFrom</code> property MUST first verify that the (parent) Policy does not have the <code>inheritAllowed</code> property with the value <strong>false</strong>.</li>
<li>The (child) Policy MUST access the (parent) Policy and replicate the following in the (child) Policy:
<ul>
<li>All policy-level Assets, Parties, Actions.</li>
Expand Down

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