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<div class="section" id="module-aria_extension_tosca.simple_v1_0.presentation">
<span id="aria-extension-tosca-simple-v1-0-presentation"></span><h1><a class="reference internal" href="#module-aria_extension_tosca.simple_v1_0.presentation" title="aria_extension_tosca.simple_v1_0.presentation"><code class="xref py py-mod docutils literal"><span class="pre">aria_extension_tosca.simple_v1_0.presentation</span></code></a><a class="headerlink" href="#module-aria_extension_tosca.simple_v1_0.presentation" title="Permalink to this headline"></a></h1>
<div class="section" id="module-aria_extension_tosca.simple_v1_0.presentation.extensible">
<span id="aria-extension-tosca-simple-v1-0-presentation-extensible"></span><h2><a class="reference internal" href="#module-aria_extension_tosca.simple_v1_0.presentation.extensible" title="aria_extension_tosca.simple_v1_0.presentation.extensible"><code class="xref py py-mod docutils literal"><span class="pre">aria_extension_tosca.simple_v1_0.presentation.extensible</span></code></a><a class="headerlink" href="#module-aria_extension_tosca.simple_v1_0.presentation.extensible" title="Permalink to this headline"></a></h2>
<dl class="class">
<dt id="aria_extension_tosca.simple_v1_0.presentation.extensible.ExtensiblePresentation">
<em class="property">class </em><code class="descclassname">aria_extension_tosca.simple_v1_0.presentation.extensible.</code><code class="descname">ExtensiblePresentation</code><span class="sig-paren">(</span><em>name=None</em>, <em>raw=None</em>, <em>container=None</em><span class="sig-paren">)</span><a class="headerlink" href="#aria_extension_tosca.simple_v1_0.presentation.extensible.ExtensiblePresentation" title="Permalink to this definition"></a></dt>
<dd><p>Bases: <code class="xref py py-class docutils literal"><span class="pre">aria.parser.presentation.presentation.Presentation</span></code></p>
<p>A presentation that supports an optional <code class="docutils literal"><span class="pre">_extensions</span></code> dict field.</p>
</dd></dl>
</div>
<div class="section" id="module-aria_extension_tosca.simple_v1_0.presentation.field_getters">
<span id="aria-extension-tosca-simple-v1-0-presentation-field-getters"></span><h2><a class="reference internal" href="#module-aria_extension_tosca.simple_v1_0.presentation.field_getters" title="aria_extension_tosca.simple_v1_0.presentation.field_getters"><code class="xref py py-mod docutils literal"><span class="pre">aria_extension_tosca.simple_v1_0.presentation.field_getters</span></code></a><a class="headerlink" href="#module-aria_extension_tosca.simple_v1_0.presentation.field_getters" title="Permalink to this headline"></a></h2>
<dl class="function">
<dt id="aria_extension_tosca.simple_v1_0.presentation.field_getters.data_type_class_getter">
<code class="descclassname">aria_extension_tosca.simple_v1_0.presentation.field_getters.</code><code class="descname">data_type_class_getter</code><span class="sig-paren">(</span><em>cls</em><span class="sig-paren">)</span><a class="headerlink" href="#aria_extension_tosca.simple_v1_0.presentation.field_getters.data_type_class_getter" title="Permalink to this definition"></a></dt>
<dd><p>Wraps the field value in a specialized data type class.</p>
<p>Can be used with the <code class="xref py py-func docutils literal"><span class="pre">field_getter()</span></code> decorator.</p>
</dd></dl>
</div>
<div class="section" id="module-aria_extension_tosca.simple_v1_0.presentation.field_validators">
<span id="aria-extension-tosca-simple-v1-0-presentation-field-validators"></span><h2><a class="reference internal" href="#module-aria_extension_tosca.simple_v1_0.presentation.field_validators" title="aria_extension_tosca.simple_v1_0.presentation.field_validators"><code class="xref py py-mod docutils literal"><span class="pre">aria_extension_tosca.simple_v1_0.presentation.field_validators</span></code></a><a class="headerlink" href="#module-aria_extension_tosca.simple_v1_0.presentation.field_validators" title="Permalink to this headline"></a></h2>
<dl class="function">
<dt id="aria_extension_tosca.simple_v1_0.presentation.field_validators.capability_definition_or_type_validator">
<code class="descclassname">aria_extension_tosca.simple_v1_0.presentation.field_validators.</code><code class="descname">capability_definition_or_type_validator</code><span class="sig-paren">(</span><em>field</em>, <em>presentation</em>, <em>context</em><span class="sig-paren">)</span><a class="headerlink" href="#aria_extension_tosca.simple_v1_0.presentation.field_validators.capability_definition_or_type_validator" title="Permalink to this definition"></a></dt>
<dd><p>Makes sure refers to either a capability assignment name in the node template referred to by the
<code class="docutils literal"><span class="pre">node</span></code> field or a general capability type.</p>
<p>If the value refers to a capability type, make sure the <code class="docutils literal"><span class="pre">node</span></code> field was not assigned.</p>
<p>Used with the <code class="xref py py-func docutils literal"><span class="pre">field_validator()</span></code> decorator for the <code class="docutils literal"><span class="pre">capability</span></code> field in
<code class="xref py py-class docutils literal"><span class="pre">RequirementAssignment</span></code>.</p>
</dd></dl>
<dl class="function">
<dt id="aria_extension_tosca.simple_v1_0.presentation.field_validators.constraint_clause_field_validator">
<code class="descclassname">aria_extension_tosca.simple_v1_0.presentation.field_validators.</code><code class="descname">constraint_clause_field_validator</code><span class="sig-paren">(</span><em>field</em>, <em>presentation</em>, <em>context</em><span class="sig-paren">)</span><a class="headerlink" href="#aria_extension_tosca.simple_v1_0.presentation.field_validators.constraint_clause_field_validator" title="Permalink to this definition"></a></dt>
<dd><p>Makes sure that field contains a valid value for the container type.</p>
<p>Used with the <code class="xref py py-func docutils literal"><span class="pre">field_validator()</span></code> decorator for various field in <code class="xref py py-class docutils literal"><span class="pre">ConstraintClause</span></code>.</p>
</dd></dl>
<dl class="function">
<dt id="aria_extension_tosca.simple_v1_0.presentation.field_validators.constraint_clause_in_range_validator">
<code class="descclassname">aria_extension_tosca.simple_v1_0.presentation.field_validators.</code><code class="descname">constraint_clause_in_range_validator</code><span class="sig-paren">(</span><em>field</em>, <em>presentation</em>, <em>context</em><span class="sig-paren">)</span><a class="headerlink" href="#aria_extension_tosca.simple_v1_0.presentation.field_validators.constraint_clause_in_range_validator" title="Permalink to this definition"></a></dt>
<dd><p>Makes sure that the value is a list with exactly two elements, that both lower bound contains a
valid value for the container type, and that the upper bound is either “UNBOUNDED” or a valid
value for the container type.</p>
<p>Used with the <code class="xref py py-func docutils literal"><span class="pre">field_validator()</span></code> decorator for the <code class="docutils literal"><span class="pre">in_range</span></code> field in
<code class="xref py py-class docutils literal"><span class="pre">ConstraintClause</span></code>.</p>
</dd></dl>
<dl class="function">
<dt id="aria_extension_tosca.simple_v1_0.presentation.field_validators.constraint_clause_pattern_validator">
<code class="descclassname">aria_extension_tosca.simple_v1_0.presentation.field_validators.</code><code class="descname">constraint_clause_pattern_validator</code><span class="sig-paren">(</span><em>field</em>, <em>presentation</em>, <em>context</em><span class="sig-paren">)</span><a class="headerlink" href="#aria_extension_tosca.simple_v1_0.presentation.field_validators.constraint_clause_pattern_validator" title="Permalink to this definition"></a></dt>
<dd><p>Makes sure that the value is a valid regular expression.</p>
<p>Used with the <code class="xref py py-func docutils literal"><span class="pre">field_validator()</span></code> decorator for the <code class="docutils literal"><span class="pre">pattern</span></code> field in
<code class="xref py py-class docutils literal"><span class="pre">ConstraintClause</span></code>.</p>
</dd></dl>
<dl class="function">
<dt id="aria_extension_tosca.simple_v1_0.presentation.field_validators.constraint_clause_valid_values_validator">
<code class="descclassname">aria_extension_tosca.simple_v1_0.presentation.field_validators.</code><code class="descname">constraint_clause_valid_values_validator</code><span class="sig-paren">(</span><em>field</em>, <em>presentation</em>, <em>context</em><span class="sig-paren">)</span><a class="headerlink" href="#aria_extension_tosca.simple_v1_0.presentation.field_validators.constraint_clause_valid_values_validator" title="Permalink to this definition"></a></dt>
<dd><p>Makes sure that the value is a list of valid values for the container type.</p>
<p>Used with the <code class="xref py py-func docutils literal"><span class="pre">field_validator()</span></code> decorator for the <code class="docutils literal"><span class="pre">valid_values</span></code> field in
<code class="xref py py-class docutils literal"><span class="pre">ConstraintClause</span></code>.</p>
</dd></dl>
<dl class="function">
<dt id="aria_extension_tosca.simple_v1_0.presentation.field_validators.copy_validator">
<code class="descclassname">aria_extension_tosca.simple_v1_0.presentation.field_validators.</code><code class="descname">copy_validator</code><span class="sig-paren">(</span><em>template_type_name</em>, <em>templates_dict_name</em><span class="sig-paren">)</span><a class="headerlink" href="#aria_extension_tosca.simple_v1_0.presentation.field_validators.copy_validator" title="Permalink to this definition"></a></dt>
<dd><p>Makes sure that the field refers to an existing template defined in the root presenter.</p>
<p>Use with the <code class="xref py py-func docutils literal"><span class="pre">field_validator()</span></code> decorator for the <code class="docutils literal"><span class="pre">copy</span></code> field in
<code class="xref py py-class docutils literal"><span class="pre">NodeTemplate</span></code> and <code class="xref py py-class docutils literal"><span class="pre">RelationshipTemplate</span></code>.</p>
</dd></dl>
<dl class="function">
<dt id="aria_extension_tosca.simple_v1_0.presentation.field_validators.data_type_constraints_validator">
<code class="descclassname">aria_extension_tosca.simple_v1_0.presentation.field_validators.</code><code class="descname">data_type_constraints_validator</code><span class="sig-paren">(</span><em>field</em>, <em>presentation</em>, <em>context</em><span class="sig-paren">)</span><a class="headerlink" href="#aria_extension_tosca.simple_v1_0.presentation.field_validators.data_type_constraints_validator" title="Permalink to this definition"></a></dt>
<dd><p>Makes sure that we do not have constraints if we are a complex type (with no primitive
ancestor).</p>
</dd></dl>
<dl class="function">
<dt id="aria_extension_tosca.simple_v1_0.presentation.field_validators.data_type_derived_from_validator">
<code class="descclassname">aria_extension_tosca.simple_v1_0.presentation.field_validators.</code><code class="descname">data_type_derived_from_validator</code><span class="sig-paren">(</span><em>field</em>, <em>presentation</em>, <em>context</em><span class="sig-paren">)</span><a class="headerlink" href="#aria_extension_tosca.simple_v1_0.presentation.field_validators.data_type_derived_from_validator" title="Permalink to this definition"></a></dt>
<dd><p>Makes sure that the field refers to a valid parent data type (complex or primitive).</p>
<p>Used with the <code class="xref py py-func docutils literal"><span class="pre">field_validator()</span></code> decorator for the <code class="docutils literal"><span class="pre">derived_from</span></code> field in
<code class="xref py py-class docutils literal"><span class="pre">DataType</span></code>.</p>
</dd></dl>
<dl class="function">
<dt id="aria_extension_tosca.simple_v1_0.presentation.field_validators.data_type_properties_validator">
<code class="descclassname">aria_extension_tosca.simple_v1_0.presentation.field_validators.</code><code class="descname">data_type_properties_validator</code><span class="sig-paren">(</span><em>field</em>, <em>presentation</em>, <em>context</em><span class="sig-paren">)</span><a class="headerlink" href="#aria_extension_tosca.simple_v1_0.presentation.field_validators.data_type_properties_validator" title="Permalink to this definition"></a></dt>
<dd><p>Makes sure that we do not have properties if we have a primitive ancestor.</p>
<p>Used with the <code class="xref py py-func docutils literal"><span class="pre">field_validator()</span></code> decorator for the <code class="docutils literal"><span class="pre">properties</span></code> field in
<code class="xref py py-class docutils literal"><span class="pre">DataType</span></code>.</p>
</dd></dl>
<dl class="function">
<dt id="aria_extension_tosca.simple_v1_0.presentation.field_validators.data_type_validator">
<code class="descclassname">aria_extension_tosca.simple_v1_0.presentation.field_validators.</code><code class="descname">data_type_validator</code><span class="sig-paren">(</span><em>type_name='data type'</em><span class="sig-paren">)</span><a class="headerlink" href="#aria_extension_tosca.simple_v1_0.presentation.field_validators.data_type_validator" title="Permalink to this definition"></a></dt>
<dd><p>Makes sure that the field refers to a valid data type, whether complex or primitive.</p>
<p>Used with the <code class="xref py py-func docutils literal"><span class="pre">field_validator()</span></code> decorator for the <code class="docutils literal"><span class="pre">type</span></code> fields in
<code class="xref py py-class docutils literal"><span class="pre">PropertyDefinition</span></code>, <code class="xref py py-class docutils literal"><span class="pre">AttributeDefinition</span></code>, <code class="xref py py-class docutils literal"><span class="pre">ParameterDefinition</span></code>,
and <code class="xref py py-class docutils literal"><span class="pre">EntrySchema</span></code>.</p>
<p>Extra behavior beyond validation: generated function returns true if field is a complex data
type.</p>
</dd></dl>
<dl class="function">
<dt id="aria_extension_tosca.simple_v1_0.presentation.field_validators.data_value_validator">
<code class="descclassname">aria_extension_tosca.simple_v1_0.presentation.field_validators.</code><code class="descname">data_value_validator</code><span class="sig-paren">(</span><em>field</em>, <em>presentation</em>, <em>context</em><span class="sig-paren">)</span><a class="headerlink" href="#aria_extension_tosca.simple_v1_0.presentation.field_validators.data_value_validator" title="Permalink to this definition"></a></dt>
<dd><p>Makes sure that the field contains a valid value according to data type and constraints.</p>
<p>Used with the <code class="xref py py-func docutils literal"><span class="pre">field_validator()</span></code> decorator for the <code class="docutils literal"><span class="pre">default</span></code> field in
<code class="xref py py-class docutils literal"><span class="pre">PropertyDefinition</span></code> and <code class="xref py py-class docutils literal"><span class="pre">AttributeDefinition</span></code>.</p>
</dd></dl>
<dl class="function">
<dt id="aria_extension_tosca.simple_v1_0.presentation.field_validators.entry_schema_validator">
<code class="descclassname">aria_extension_tosca.simple_v1_0.presentation.field_validators.</code><code class="descname">entry_schema_validator</code><span class="sig-paren">(</span><em>field</em>, <em>presentation</em>, <em>context</em><span class="sig-paren">)</span><a class="headerlink" href="#aria_extension_tosca.simple_v1_0.presentation.field_validators.entry_schema_validator" title="Permalink to this definition"></a></dt>
<dd><p>According to whether the data type supports <code class="docutils literal"><span class="pre">entry_schema</span></code> (e.g., it is or inherits from
list or map), make sure that we either have or don’t have a valid data type value.</p>
<p>Used with the <code class="xref py py-func docutils literal"><span class="pre">field_validator()</span></code> decorator for the <code class="docutils literal"><span class="pre">entry_schema</span></code> field in
<code class="xref py py-class docutils literal"><span class="pre">PropertyDefinition</span></code> and <code class="xref py py-class docutils literal"><span class="pre">AttributeDefinition</span></code>.</p>
</dd></dl>
<dl class="function">
<dt id="aria_extension_tosca.simple_v1_0.presentation.field_validators.list_node_type_or_group_type_validator">
<code class="descclassname">aria_extension_tosca.simple_v1_0.presentation.field_validators.</code><code class="descname">list_node_type_or_group_type_validator</code><span class="sig-paren">(</span><em>field</em>, <em>presentation</em>, <em>context</em><span class="sig-paren">)</span><a class="headerlink" href="#aria_extension_tosca.simple_v1_0.presentation.field_validators.list_node_type_or_group_type_validator" title="Permalink to this definition"></a></dt>
<dd><p>Makes sure that the field’s elements refer to either node types or a group types.</p>
<p>Used with the <code class="xref py py-func docutils literal"><span class="pre">field_validator()</span></code> decorator for the <code class="docutils literal"><span class="pre">targets</span></code> field in
<code class="xref py py-class docutils literal"><span class="pre">PolicyType</span></code>.</p>
</dd></dl>
<dl class="function">
<dt id="aria_extension_tosca.simple_v1_0.presentation.field_validators.node_filter_capabilities_validator">
<code class="descclassname">aria_extension_tosca.simple_v1_0.presentation.field_validators.</code><code class="descname">node_filter_capabilities_validator</code><span class="sig-paren">(</span><em>field</em>, <em>presentation</em>, <em>context</em><span class="sig-paren">)</span><a class="headerlink" href="#aria_extension_tosca.simple_v1_0.presentation.field_validators.node_filter_capabilities_validator" title="Permalink to this definition"></a></dt>
<dd><p>Makes sure that the field’s elements refer to defined capabilities and properties in the target
node type.</p>
<p>Used with the <code class="xref py py-func docutils literal"><span class="pre">field_validator()</span></code> decorator for the <code class="docutils literal"><span class="pre">capabilities</span></code> field in
<code class="xref py py-class docutils literal"><span class="pre">NodeFilter</span></code>.</p>
</dd></dl>
<dl class="function">
<dt id="aria_extension_tosca.simple_v1_0.presentation.field_validators.node_filter_properties_validator">
<code class="descclassname">aria_extension_tosca.simple_v1_0.presentation.field_validators.</code><code class="descname">node_filter_properties_validator</code><span class="sig-paren">(</span><em>field</em>, <em>presentation</em>, <em>context</em><span class="sig-paren">)</span><a class="headerlink" href="#aria_extension_tosca.simple_v1_0.presentation.field_validators.node_filter_properties_validator" title="Permalink to this definition"></a></dt>
<dd><p>Makes sure that the field’s elements refer to defined properties in the target node type.</p>
<p>Used with the <code class="xref py py-func docutils literal"><span class="pre">field_validator()</span></code> decorator for the <code class="docutils literal"><span class="pre">properties</span></code> field in
<code class="xref py py-class docutils literal"><span class="pre">NodeFilter</span></code>.</p>
</dd></dl>
<dl class="function">
<dt id="aria_extension_tosca.simple_v1_0.presentation.field_validators.node_filter_validator">
<code class="descclassname">aria_extension_tosca.simple_v1_0.presentation.field_validators.</code><code class="descname">node_filter_validator</code><span class="sig-paren">(</span><em>field</em>, <em>presentation</em>, <em>context</em><span class="sig-paren">)</span><a class="headerlink" href="#aria_extension_tosca.simple_v1_0.presentation.field_validators.node_filter_validator" title="Permalink to this definition"></a></dt>
<dd><p>Makes sure that the field has a value only if “node” refers to a node type.</p>
<p>Used with the <code class="xref py py-func docutils literal"><span class="pre">field_validator()</span></code> decorator for the <code class="docutils literal"><span class="pre">node_filter</span></code> field in
<code class="xref py py-class docutils literal"><span class="pre">RequirementAssignment</span></code>.</p>
</dd></dl>
<dl class="function">
<dt id="aria_extension_tosca.simple_v1_0.presentation.field_validators.node_template_or_type_validator">
<code class="descclassname">aria_extension_tosca.simple_v1_0.presentation.field_validators.</code><code class="descname">node_template_or_type_validator</code><span class="sig-paren">(</span><em>field</em>, <em>presentation</em>, <em>context</em><span class="sig-paren">)</span><a class="headerlink" href="#aria_extension_tosca.simple_v1_0.presentation.field_validators.node_template_or_type_validator" title="Permalink to this definition"></a></dt>
<dd><p>Makes sure that the field refers to either a node template or a node type.</p>
<p>Used with the <code class="xref py py-func docutils literal"><span class="pre">field_validator()</span></code> decorator for the <code class="docutils literal"><span class="pre">node</span></code> field in
<code class="xref py py-class docutils literal"><span class="pre">RequirementAssignment</span></code>.</p>
</dd></dl>
<dl class="function">
<dt id="aria_extension_tosca.simple_v1_0.presentation.field_validators.policy_targets_validator">
<code class="descclassname">aria_extension_tosca.simple_v1_0.presentation.field_validators.</code><code class="descname">policy_targets_validator</code><span class="sig-paren">(</span><em>field</em>, <em>presentation</em>, <em>context</em><span class="sig-paren">)</span><a class="headerlink" href="#aria_extension_tosca.simple_v1_0.presentation.field_validators.policy_targets_validator" title="Permalink to this definition"></a></dt>
<dd><p>Makes sure that the field’s elements refer to either node templates or groups, and that
they match the node types and group types declared in the policy type.</p>
<p>Used with the <code class="xref py py-func docutils literal"><span class="pre">field_validator()</span></code> decorator for the <code class="docutils literal"><span class="pre">targets</span></code> field in
<code class="xref py py-class docutils literal"><span class="pre">PolicyTemplate</span></code>.</p>
</dd></dl>
<dl class="function">
<dt id="aria_extension_tosca.simple_v1_0.presentation.field_validators.relationship_template_or_type_validator">
<code class="descclassname">aria_extension_tosca.simple_v1_0.presentation.field_validators.</code><code class="descname">relationship_template_or_type_validator</code><span class="sig-paren">(</span><em>field</em>, <em>presentation</em>, <em>context</em><span class="sig-paren">)</span><a class="headerlink" href="#aria_extension_tosca.simple_v1_0.presentation.field_validators.relationship_template_or_type_validator" title="Permalink to this definition"></a></dt>
<dd><p>Makes sure that the field refers to either a relationship template or a relationship type.</p>
<p>Used with the <code class="xref py py-func docutils literal"><span class="pre">field_validator()</span></code> decorator for the <code class="docutils literal"><span class="pre">type</span></code> field in
<code class="xref py py-class docutils literal"><span class="pre">RelationshipAssignment</span></code>.</p>
</dd></dl>
</div>
<div class="section" id="module-aria_extension_tosca.simple_v1_0.presentation.types">
<span id="aria-extension-tosca-simple-v1-0-presentation-types"></span><h2><a class="reference internal" href="#module-aria_extension_tosca.simple_v1_0.presentation.types" title="aria_extension_tosca.simple_v1_0.presentation.types"><code class="xref py py-mod docutils literal"><span class="pre">aria_extension_tosca.simple_v1_0.presentation.types</span></code></a><a class="headerlink" href="#module-aria_extension_tosca.simple_v1_0.presentation.types" title="Permalink to this headline"></a></h2>
<dl class="function">
<dt id="aria_extension_tosca.simple_v1_0.presentation.types.convert_shorthand_to_full_type_name">
<code class="descclassname">aria_extension_tosca.simple_v1_0.presentation.types.</code><code class="descname">convert_shorthand_to_full_type_name</code><span class="sig-paren">(</span><em>context</em>, <em>name</em>, <em>types_dict</em><span class="sig-paren">)</span><a class="headerlink" href="#aria_extension_tosca.simple_v1_0.presentation.types.convert_shorthand_to_full_type_name" title="Permalink to this definition"></a></dt>
<dd><p>Converts a shorthand type name to its full type name, or else returns it unchanged.</p>
<p>Works by checking for <code class="docutils literal"><span class="pre">shorthand_name</span></code> in the types’ <code class="docutils literal"><span class="pre">_extensions</span></code> field. See also
<code class="xref py py-class docutils literal"><span class="pre">aria_extension_tosca.v1_0.presentation.extensible.ExtensiblePresentation</span></code>.</p>
<p>Can be used as the conversion function argument in <code class="docutils literal"><span class="pre">type_validator</span></code> and
<code class="docutils literal"><span class="pre">derived_from_validator</span></code>.</p>
</dd></dl>
<dl class="function">
<dt id="aria_extension_tosca.simple_v1_0.presentation.types.get_type_by_full_or_shorthand_name">
<code class="descclassname">aria_extension_tosca.simple_v1_0.presentation.types.</code><code class="descname">get_type_by_full_or_shorthand_name</code><span class="sig-paren">(</span><em>context</em>, <em>name</em>, <em>*types_dict_names</em><span class="sig-paren">)</span><a class="headerlink" href="#aria_extension_tosca.simple_v1_0.presentation.types.get_type_by_full_or_shorthand_name" title="Permalink to this definition"></a></dt>
<dd><p>Gets a type either by its full name or its shorthand name.</p>
<p>Works by checking for <code class="docutils literal"><span class="pre">shorthand_name</span></code> in the types’ <code class="docutils literal"><span class="pre">_extensions</span></code> field. See also
<code class="xref py py-class docutils literal"><span class="pre">ExtensiblePresentation</span></code>.</p>
<p>The arguments from the third onwards are used to locate a nested field under
<code class="docutils literal"><span class="pre">service_template</span></code> under the root presenter.</p>
</dd></dl>
</div>
</div>
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