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| <li><a href="protocol-specification-policies-announcement.html">Announcement</a></li> |
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| <li><a href="protocol-bindings.html">Bindings</a></li> |
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| <li class="subfolders"> |
| <a href="#"><span></span>→ Things examples</a> |
| <ul> |
| |
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| |
| <li><a href="protocol-examples-creatething.html">Create a Thing</a></li> |
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| <li><a href="protocol-examples-deletething.html">Delete a Thing</a></li> |
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| <li><a href="protocol-examples-modifything.html">Modify a Thing</a></li> |
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| <li><a href="protocol-examples-retrievething.html">Retrieve a Thing</a></li> |
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| <li><a href="protocol-examples-retrievethings.html">Retrieve multiple Things</a></li> |
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| <li><a href="protocol-examples-modifypolicyid.html">Modify the Policy ID of a Thing</a></li> |
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| <li><a href="protocol-examples-createattributes.html">Create Attributes</a></li> |
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| <li><a href="protocol-examples-deleteattributes.html">Delete Attributes</a></li> |
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| <li><a href="protocol-examples-modifyattributes.html">Modify Attributes</a></li> |
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| <li><a href="protocol-examples-retrieveattributes.html">Retrieve Attributes</a></li> |
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| <li><a href="protocol-examples-createattribute.html">Create a single Attribute</a></li> |
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| <li><a href="protocol-examples-deleteattribute.html">Delete a single Attribute</a></li> |
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| <li><a href="protocol-examples-modifyattribute.html">Modify a single Attribute</a></li> |
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| <li><a href="protocol-examples-retrieveattribute.html">Retrieve a single Attribute</a></li> |
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| <li><a href="protocol-examples-createthingdefinition.html">Create a Definition</a></li> |
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| <li><a href="protocol-examples-retrievethingdefinition.html">Retrieve a Definition</a></li> |
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| <li><a href="protocol-examples-createfeatures.html">Create Features</a></li> |
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| <li><a href="protocol-examples-deletefeatures.html">Delete Features</a></li> |
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| <li><a href="protocol-examples-modifyfeatures.html">Modify Features</a></li> |
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| <li><a href="protocol-examples-retrievefeatures.html">Retrieve Features</a></li> |
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| <li><a href="protocol-examples-createfeature.html">Create a single Feature</a></li> |
| |
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| <li><a href="protocol-examples-deletefeature.html">Delete a single Feature</a></li> |
| |
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| <li><a href="protocol-examples-modifyfeature.html">Modify a single Feature</a></li> |
| |
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| <li><a href="protocol-examples-retrievefeature.html">Retrieve a single Feature</a></li> |
| |
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| <li><a href="protocol-examples-createdefinition.html">Create Feature Definition</a></li> |
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| <li><a href="protocol-examples-deletedefinition.html">Delete Feature Definition</a></li> |
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| <li><a href="protocol-examples-modifydefinition.html">Modify Feature Definition</a></li> |
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| <li><a href="protocol-examples-retrievedefinition.html">Retrieve Feature Definition</a></li> |
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| <li><a href="protocol-examples-createproperties.html">Create Feature Properties</a></li> |
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| <li><a href="protocol-examples-deleteproperties.html">Delete Feature Properties</a></li> |
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| <li><a href="protocol-examples-modifyproperties.html">Modify Feature Properties</a></li> |
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| <li><a href="protocol-examples-retrieveproperties.html">Retrieve Feature Properties</a></li> |
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| <li><a href="protocol-examples-createproperty.html">Create a single Property</a></li> |
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| <li><a href="protocol-examples-deleteproperty.html">Delete a single Property</a></li> |
| |
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| <li><a href="protocol-examples-modifyproperty.html">Modify a single Property</a></li> |
| |
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| <li><a href="protocol-examples-retrieveproperty.html">Retrieve a single Property</a></li> |
| |
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| |
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| |
| <li><a href="protocol-examples-createdesiredproperties.html">Create desired Feature Properties</a></li> |
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| <li><a href="protocol-examples-deletedesiredproperties.html">Delete desired Feature Properties</a></li> |
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| <li><a href="protocol-examples-modifydesiredproperties.html">Modify desired Feature Properties</a></li> |
| |
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| <li><a href="protocol-examples-retrievedesiredproperties.html">Retrieve desired Feature Properties</a></li> |
| |
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| <li><a href="protocol-examples-createdesiredproperty.html">Create a single desired Property</a></li> |
| |
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| <li><a href="protocol-examples-deletedesiredproperty.html">Delete a single desired Property</a></li> |
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| <li><a href="protocol-examples-modifydesiredproperty.html">Modify a single desired Property</a></li> |
| |
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| <li><a href="protocol-examples-retrievedesiredproperty.html">Retrieve a single desired Property</a></li> |
| |
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| <li><a href="protocol-examples-errorresponses.html">Error responses</a></li> |
| |
| |
| |
| </ul> |
| </li> |
| |
| |
| |
| <li class="subfolders"> |
| <a href="#"><span></span>→ Things merge examples</a> |
| <ul> |
| |
| |
| |
| <li><a href="protocol-examples-mergething.html">Merge a Thing</a></li> |
| |
| |
| |
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| <li><a href="protocol-examples-mergepolicyid.html">Merge the Policy ID of a Thing</a></li> |
| |
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| <li><a href="protocol-examples-mergeattributes.html">Merge Attributes</a></li> |
| |
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| <li><a href="protocol-examples-mergeattribute.html">Merge a single Attribute</a></li> |
| |
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| <li><a href="protocol-examples-mergethingdefinition.html">Merge a Definition</a></li> |
| |
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| <li><a href="protocol-examples-mergefeatures.html">Merge Features</a></li> |
| |
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| <li><a href="protocol-examples-mergefeature.html">Merge a single Feature</a></li> |
| |
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| <li><a href="protocol-examples-mergefeaturedefinition.html">Merge Feature Definition</a></li> |
| |
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| <li><a href="protocol-examples-mergeproperties.html">Merge Feature Properties</a></li> |
| |
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| <li><a href="protocol-examples-mergeproperty.html">Merge a single Property</a></li> |
| |
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| <li><a href="protocol-examples-mergedesiredproperties.html">Merge desired Feature Properties</a></li> |
| |
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| <li><a href="protocol-examples-mergedesiredproperty.html">Merge a single desired Property</a></li> |
| |
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| <li><a href="protocol-examples-errorresponses.html">Error responses</a></li> |
| |
| |
| |
| </ul> |
| </li> |
| |
| |
| |
| <li class="subfolders"> |
| <a href="#"><span></span>→ Policies examples</a> |
| <ul> |
| |
| |
| |
| <li><a href="protocol-examples-policies-createpolicy.html">Create a Policy</a></li> |
| |
| |
| |
| |
| |
| <li><a href="protocol-examples-policies-deletepolicy.html">Delete a Policy</a></li> |
| |
| |
| |
| |
| |
| <li><a href="protocol-examples-policies-modifypolicy.html">Modify a Policy</a></li> |
| |
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| |
| <li><a href="protocol-examples-policies-retrievepolicy.html">Retrieve a Policy</a></li> |
| |
| |
| |
| |
| |
| <li><a href="protocol-examples-policies-modifypolicyentries.html">Modify entries</a></li> |
| |
| |
| |
| |
| |
| <li><a href="protocol-examples-policies-retrievepolicyentries.html">Retrieve entries</a></li> |
| |
| |
| |
| |
| |
| <li><a href="protocol-examples-policies-createpolicyentry.html">Create a single entry</a></li> |
| |
| |
| |
| |
| |
| <li><a href="protocol-examples-policies-deletepolicyentry.html">Delete a single entry</a></li> |
| |
| |
| |
| |
| |
| <li><a href="protocol-examples-policies-modifypolicyentry.html">Modify a single entry</a></li> |
| |
| |
| |
| |
| |
| <li><a href="protocol-examples-policies-retrievepolicyentry.html">Retrieve a single entry</a></li> |
| |
| |
| |
| |
| |
| <li><a href="protocol-examples-policies-modifysubjects.html">Modify subjects</a></li> |
| |
| |
| |
| |
| |
| <li><a href="protocol-examples-policies-retrievesubjects.html">Retrieve subjects</a></li> |
| |
| |
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| |
| |
| <li><a href="protocol-examples-policies-createsubject.html">Create a single subject</a></li> |
| |
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| |
| <li><a href="protocol-examples-policies-deletesubject.html">Delete a single subject</a></li> |
| |
| |
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| |
| |
| <li><a href="protocol-examples-policies-modifysubject.html">Modify a single subject</a></li> |
| |
| |
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| |
| |
| <li><a href="protocol-examples-policies-retrievesubject.html">Retrieve a single subject</a></li> |
| |
| |
| |
| |
| |
| <li><a href="protocol-examples-policies-modifyresources.html">Modify resources</a></li> |
| |
| |
| |
| |
| |
| <li><a href="protocol-examples-policies-retrieveresources.html">Retrieve resources</a></li> |
| |
| |
| |
| |
| |
| <li><a href="protocol-examples-policies-createresource.html">Create a single resource</a></li> |
| |
| |
| |
| |
| |
| <li><a href="protocol-examples-policies-deleteresource.html">Delete a single resource</a></li> |
| |
| |
| |
| |
| |
| <li><a href="protocol-examples-policies-modifyresource.html">Modify a single resource</a></li> |
| |
| |
| |
| |
| |
| <li><a href="protocol-examples-policies-retrieveresource.html">Retrieve a single resource</a></li> |
| |
| |
| |
| |
| |
| <li><a href="protocol-examples-policies-errorresponses.html">Error responses</a></li> |
| |
| |
| |
| |
| |
| <li><a href="protocol-examples-policies-announcement-subjectDeletion.html">Announcement for subject deletion</a></li> |
| |
| |
| |
| </ul> |
| </li> |
| |
| |
| |
| |
| |
| |
| <li><a href="protocol-examples-search.html">→ Search examples</a></li> |
| |
| |
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| |
| </ul> |
| </li> |
| |
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| <li><a href="sandbox.html">Sandbox</a></li> |
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| <li><a href="presentations.html">Presentations</a></li> |
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| <li><a href="glossary.html">Glossary</a></li> |
| |
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| <li><a href="feedback.html">Feedback</a></li> |
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| <p class="external"> |
| <a href="#" id="collapseAll">Collapse All</a> | <a href="#" id="expandAll">Expand All</a> |
| </p> |
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| </ul> |
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| </div> |
| |
| |
| |
| <!-- Content Column --> |
| <div class="col-md-9" id="tg-sb-content"> |
| <div class="post-header"> |
| <h1 class="post-title-main">Thing</h1> |
| </div> |
| |
| |
| |
| <div class="post-content"> |
| |
| |
| |
| |
| |
| <!-- this handles the automatic toc. use ## for subheads to auto-generate the on-page minitoc. if you use html tags, you must supply an ID for the heading element in order for it to appear in the minitoc. --> |
| <script> |
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| // Handler for .ready() called. |
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| $('#toc').toc({ minimumHeaders: 0, listType: 'ul', showSpeed: 0, headers: 'h2,h3,h4' }); |
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| <div id="toc"></div> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| <p>The versatile assets in IoT applications can be managed as Things.</p> |
| |
| <h2 id="thing">Thing</h2> |
| |
| <p>Things are very generic entities and are mostly used as a “handle” for multiple features belonging to this Thing.</p> |
| |
| <p>Examples:</p> |
| |
| <ul> |
| <li>Physical Device: a lawn mower, a sensor, a vehicle, a lamp.</li> |
| <li>Virtual Device: a room in a house, a virtual power plant spanning multiple power plants, the weather information for |
| a specific location collected by various sensors.</li> |
| <li>Transactional entity: a tour of a vehicle (from start until stop), a series of measurements of a machine.</li> |
| <li>Master data entity: a supplier of devices or a service provider for devices, an entity representing a city/region.</li> |
| <li>Anything else - if it can be modeled and managed appropriately by the supported concepts/capabilities.</li> |
| </ul> |
| |
| <h3 id="thing-id">Thing ID</h3> |
| |
| <p>Unique identifier of a Thing. For choosing custom Thing IDs when creating a Thing, the rules for |
| <a href="basic-namespaces-and-names.html#namespaced-id">namespaced IDs</a> apply.</p> |
| |
| <h3 id="access-control">Access control</h3> |
| |
| <p>A Thing in API version 2 contains a link to a <a href="basic-policy.html">Policy</a> in form of a <code class="highlighter-rouge">policyId</code>. |
| This <a href="#" data-toggle="tooltip" data-original-title="A Policy enables developers to configure fine-grained access control in an easy way. A specific policy defines who (subject) is granted or revoked permissions (rights) on a specific resource. The resource can be defined as rough or as fine-grained as necessary for the respective use case. ">Policy</a> defines which |
| authenticated subjects may READ and WRITE the Thing or even parts of it (hierarchically specified).</p> |
| |
| <h3 id="definition">Definition</h3> |
| |
| <p>A Thing may contain a definition. The definition can also be used to find Things. The definition is used to link a thing |
| to a corresponding model defining the capabilities/features of it, e.g. via an |
| <a href="https://www.eclipse.org/vorto/">Eclipse Vorto</a> “information model”.</p> |
| |
| <h3 id="attributes">Attributes</h3> |
| |
| <p>Attributes describe the Thing in more detail and can be of any type. Attributes can also be used to find Things. |
| Attributes are typically used to model rather static properties at the Thing level. Static means that the values do not |
| change as frequently as property values of Features.</p> |
| |
| <h3 id="features">Features</h3> |
| |
| <p>A Thing may contain an arbitrary amount of <a href="basic-feature.html">Features</a>.</p> |
| |
| <figure><img class="docimage" src="images/pages/basic/ditto-thing-feature.png" alt="Thing and Feature" style="max-width: 100px" /><figcaption>One Thing can have |
| many Features</figcaption></figure> |
| |
| <h3 id="metadata">Metadata</h3> |
| |
| <p>A Thing may contain additional <a href="basic-metadata.html">metadata</a> for all of its attributes and features describing the |
| semantics of the data or adding other useful information about the data points of the twin.</p> |
| |
| <h3 id="model-specification">Model specification</h3> |
| |
| <h4 id="api-version-2">API version 2</h4> |
| |
| <script src="docson/widget.js" data-schema="../jsonschema/thing_v2.json"></script> |
| |
| <h3 id="example">Example</h3> |
| |
| <div class="language-json highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="p">{</span><span class="w"> |
| </span><span class="s2">"thingId"</span><span class="p">:</span><span class="w"> </span><span class="s2">"the.namespace:theId"</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"policyId"</span><span class="p">:</span><span class="w"> </span><span class="s2">"the.namespace:thePolicyId"</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"definition"</span><span class="p">:</span><span class="w"> </span><span class="s2">"org.eclipse.ditto:HeatingDevice:2.1.0"</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"attributes"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"someAttr"</span><span class="p">:</span><span class="w"> </span><span class="mi">32</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"manufacturer"</span><span class="p">:</span><span class="w"> </span><span class="s2">"ACME corp"</span><span class="w"> |
| </span><span class="p">},</span><span class="w"> |
| </span><span class="s2">"features"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"heating-no1"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"properties"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"connected"</span><span class="p">:</span><span class="w"> </span><span class="kc">true</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"complexProperty"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"street"</span><span class="p">:</span><span class="w"> </span><span class="s2">"my street"</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"house no"</span><span class="p">:</span><span class="w"> </span><span class="mi">42</span><span class="w"> |
| </span><span class="p">}</span><span class="w"> |
| </span><span class="p">},</span><span class="w"> |
| </span><span class="s2">"desiredProperties"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"connected"</span><span class="p">:</span><span class="w"> </span><span class="kc">false</span><span class="w"> |
| </span><span class="p">}</span><span class="w"> |
| </span><span class="p">},</span><span class="w"> |
| </span><span class="s2">"switchable"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"definition"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w"> </span><span class="s2">"org.eclipse.ditto:Switcher:1.0.0"</span><span class="w"> </span><span class="p">],</span><span class="w"> |
| </span><span class="s2">"properties"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"on"</span><span class="p">:</span><span class="w"> </span><span class="kc">true</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"lastToggled"</span><span class="p">:</span><span class="w"> </span><span class="s2">"2017-11-15T18:21Z"</span><span class="w"> |
| </span><span class="p">}</span><span class="w"> |
| </span><span class="p">}</span><span class="w"> |
| </span><span class="p">}</span><span class="w"> |
| </span><span class="p">}</span><span class="w"> |
| </span></code></pre></div></div> |
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