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Added an SVG diagram of the vocabulary. #1236

Merged
merged 9 commits into from
Aug 20, 2023
85 changes: 85 additions & 0 deletions vocab/credentials/v2/template.html
Original file line number Diff line number Diff line change
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const p = sotd.getElementsByTagName('p')[0];
sotd.removeChild(p);
}
// Note: The vocabulary URL must be adapted for the given environment!!!!
function massageSVGLinks(utils, content, url) {
const retval = content
.replace('<svg', '<svg xhtml:aria-details="#vocabulary-diagram-alt" ')
.replace(/xlink:href/g, 'href')
.replace(/href="https:\/\/w3.org\/2018\/credentials#/g, 'href="#');
return retval;
}

</script>
<script class="remove">
var respecConfig = {
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box-shadow: 0 2px 8px black;
text-align: center;
}

/* This is a bug in the base css setting at W3C. There is an open PR raised for it in the
relevant github repo; if and when that is merged, this statement may become
superfluous.
See https://github.com/w3c/tr-design/pull/336
*/
figure svg {
max-width: 100%;
margin: auto;
height: auto;
}
</style>
</head>
<body typeof="owl:Ontology">
Expand Down Expand Up @@ -141,6 +161,24 @@ <h2>Specification of terms</h2>
<p>
In some cases, a local explanation is necessary to complement, or to replace, the definition found in an external specification. For instance, this is so when the term is needed to provide a consistent structure to the RDFS vocabulary, such as when the term defines a common supertype for class instances that are used as objects of specific properties, or when <a href="https://www.w3.org/TR/rdf12-concepts/#section-rdf-graph">RDF Graphs</a> are involved. For such cases, the extra definition is included in the current document (and the `rdfs:comment` property is used to include them in the RDFS representations).
</p>
<figure id="vocabulary-diagram" style="text-align:center">
<!--
Original diagram is in https://drive.google.com/file/d/1-kg7AzhahSzIwiIHeh5ANGJB_JK-kugs/view?usp=drive_link
using the draw.io (diagrams.net plugin for google).
The diagram is exported into SVG, and then the following editorial changes should be done (using any text editor):
- The "width" and "height" attributes in the top level <svg> element must be removed (to make the diagram rescale if
viewed directly)
- add the aria-details="#vocabulary-diagram-alt" attribute to the top level svg element

The exported SVG can also be viewed and edited inkscape. (The reason draw.io is used, instead of using
exclusively inkscape, is because the connecting line feature of inkscape is buggy.)
-->
<div data-include="vocabulary.svg" data-include-replace="true" data-oninclude="massageSVGLinks"></div>
<figcaption>Overview diagram of the vocabulary (without the deprecated items).<br />
A separate, stand-alone <a href="vocabulary.svg" target="_blank">SVG version</a> of the diagram, as well as a <a href="#vocabulary-diagram-alt">textual description</a>,
are also available.
</figcaption>
</figure>
</section>
<section>
<h2>Namespaces</h2>
Expand Down Expand Up @@ -207,6 +245,53 @@ <h2>Deprecated individuals</h2>
</section>
</section>

<section class="appendix" id="vocabulary-diagram-alt">
<h2>Diagram description</h2>
<details>
<summary>Overview diagram of the vocabulary (without the deprecated items).</summary>
<p>
The diagram uses boxes, ellipses, and connecting lines with different "styles" (color, end
marker, line type) to differentiate their semantic meaning; these styles identify Property, Class, Subclass, Domain,
and Range.
These style names are used in the explanation text in what follows.
</p>
<p>
In the middle of the diagram there is a column of labeled boxes, all styled as Property.
The labels, from top to bottom, are: "credentialSchema",
"credentialStatus", "credentialSubject", "issuer", "evidence",
"refreshService", "renderMethod", "confidenceMethod", "termsOfUse", "validFrom",
"validUntil", and "holder".
On the left side of this column, there are four labeled ellipses, styled as Class.
These are, from top to bottom, "VerifiableCredential", "JsonSchemaCredential",
"VerifiableCredentialGraph", and "VerifiablePresentation".
There is also a single circle, not styled as property, labeled as "OR", and another box
styled as a Property labeled as "verifiableCredential".
</p>
<p>
The "VerifiableCredential" ellipse is connected through a connecting line
styled as Domain to the "credentialSchema", "credentialStatus", "credentialSubject",
"issuer", "evidence", "refreshService", "renderMethod", and "confidenceMethod" boxes.
It is also related to the separate "OR" circle with a similar connecting line.
The "VerifiablePresentation" ellipse is connected to the "OR" box, as well as the "holder"
and "verifiableCredential" boxes with a similar connecting line styled as Domain.
The OR box is connected to the "termsOfUse", "validFrom", and "validUntil" boxes with a connecting line styled as Domain.
The "verifiableCredential" box is connected to the "VerifiableCredentialGraph" ellipse with a connecting
line styled as Range.
Finally, the ellipse "JsonSchemaCredential" is connected to the one labelled "VerifiableCredential" with a
connecting line styled as Subclass.
</p>
<p>
On the right hand side of the column there is an extra column of ellipses styled as "Class", and labeled as "CredentialSchema",
"CredentialStatus", "CredentialEvidence", "RefreshService", "ConfidenceMethos", and "TermsOfUse".
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The Property boxes labeled as "credentialSchema", "credentialStatus", "credentialEvidence,
"refreshService", "confidenceMethod", and "termsOfUse" are all connected by connecting lines styled as Range to these
ellipses, respectively.
On the right hand side of the diagram there is one more ellipse styled as Class and labeled as
"JsonSchema", connected to the the ellipse labeled as "CredentialSchema" via a connecting line
styled as Subclass.
</p>
</details>
</section>


</body>
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