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<h1 id="Lucene_Net_QueryParsers_Flexible_Core_Nodes_IQueryNode" data-uid="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode" class="text-break">Interface IQueryNode
</h1>
<div class="markdown level0 summary"><p>A <a class="xref" href="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.html">IQueryNode</a> is a interface implemented by all nodes on a <a class="xref" href="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.html">IQueryNode</a>
tree.</p>
</div>
<div class="markdown level0 conceptual"></div>
<h6><strong>Namespace</strong>: <a class="xref" href="Lucene.Net.QueryParsers.Flexible.Core.Nodes.html">Lucene.Net.QueryParsers.Flexible.Core.Nodes</a></h6>
<h6><strong>Assembly</strong>: Lucene.Net.QueryParser.dll</h6>
<h5 id="Lucene_Net_QueryParsers_Flexible_Core_Nodes_IQueryNode_syntax">Syntax</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public interface IQueryNode</code></pre>
</div>
<h3 id="properties">Properties
</h3>
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<a id="Lucene_Net_QueryParsers_Flexible_Core_Nodes_IQueryNode_IsLeaf_" data-uid="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.IsLeaf*"></a>
<h4 id="Lucene_Net_QueryParsers_Flexible_Core_Nodes_IQueryNode_IsLeaf" data-uid="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.IsLeaf">IsLeaf</h4>
<div class="markdown level1 summary"><p>verify if a node is a Leaf node</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">bool IsLeaf { get; }</code></pre>
</div>
<h5 class="propertyValue">Property Value</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Boolean</span></td>
<td></td>
</tr>
</tbody>
</table>
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<a id="Lucene_Net_QueryParsers_Flexible_Core_Nodes_IQueryNode_Parent_" data-uid="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.Parent*"></a>
<h4 id="Lucene_Net_QueryParsers_Flexible_Core_Nodes_IQueryNode_Parent" data-uid="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.Parent">Parent</h4>
<div class="markdown level1 summary"></div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">IQueryNode Parent { get; }</code></pre>
</div>
<h5 class="propertyValue">Property Value</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><a class="xref" href="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.html">IQueryNode</a></td>
<td></td>
</tr>
</tbody>
</table>
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<a id="Lucene_Net_QueryParsers_Flexible_Core_Nodes_IQueryNode_TagMap_" data-uid="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.TagMap*"></a>
<h4 id="Lucene_Net_QueryParsers_Flexible_Core_Nodes_IQueryNode_TagMap" data-uid="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.TagMap">TagMap</h4>
<div class="markdown level1 summary"><p>Gets a map containing all tags attached to this query node. </p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">IDictionary&lt;string, object&gt; TagMap { get; }</code></pre>
</div>
<h5 class="propertyValue">Property Value</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Collections.Generic.IDictionary</span>&lt;<span class="xref">System.String</span>, <span class="xref">System.Object</span>&gt;</td>
<td></td>
</tr>
</tbody>
</table>
<h3 id="methods">Methods
</h3>
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<a id="Lucene_Net_QueryParsers_Flexible_Core_Nodes_IQueryNode_Add_" data-uid="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.Add*"></a>
<h4 id="Lucene_Net_QueryParsers_Flexible_Core_Nodes_IQueryNode_Add_Lucene_Net_QueryParsers_Flexible_Core_Nodes_IQueryNode_" data-uid="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.Add(Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode)">Add(IQueryNode)</h4>
<div class="markdown level1 summary"><p>add a new child to a non Leaf node</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">void Add(IQueryNode child)</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><a class="xref" href="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.html">IQueryNode</a></td>
<td><span class="parametername">child</span></td>
<td></td>
</tr>
</tbody>
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<a id="Lucene_Net_QueryParsers_Flexible_Core_Nodes_IQueryNode_Add_" data-uid="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.Add*"></a>
<h4 id="Lucene_Net_QueryParsers_Flexible_Core_Nodes_IQueryNode_Add_System_Collections_Generic_IList_Lucene_Net_QueryParsers_Flexible_Core_Nodes_IQueryNode__" data-uid="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.Add(System.Collections.Generic.IList{Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode})">Add(IList&lt;IQueryNode&gt;)</h4>
<div class="markdown level1 summary"></div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">void Add(IList&lt;IQueryNode&gt; children)</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Collections.Generic.IList</span>&lt;<a class="xref" href="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.html">IQueryNode</a>&gt;</td>
<td><span class="parametername">children</span></td>
<td></td>
</tr>
</tbody>
</table>
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<a id="Lucene_Net_QueryParsers_Flexible_Core_Nodes_IQueryNode_CloneTree_" data-uid="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.CloneTree*"></a>
<h4 id="Lucene_Net_QueryParsers_Flexible_Core_Nodes_IQueryNode_CloneTree" data-uid="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.CloneTree">CloneTree()</h4>
<div class="markdown level1 summary"><p>Recursive clone the <a class="xref" href="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.html">IQueryNode</a> tree. The tags are not copied to the new tree
when you call the <a class="xref" href="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.html#Lucene_Net_QueryParsers_Flexible_Core_Nodes_IQueryNode_CloneTree">CloneTree()</a> method.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">IQueryNode CloneTree()</code></pre>
</div>
<h5 class="returns">Returns</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><a class="xref" href="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.html">IQueryNode</a></td>
<td><p>the cloned tree</p>
</td>
</tr>
</tbody>
</table>
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<a id="Lucene_Net_QueryParsers_Flexible_Core_Nodes_IQueryNode_ContainsTag_" data-uid="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.ContainsTag*"></a>
<h4 id="Lucene_Net_QueryParsers_Flexible_Core_Nodes_IQueryNode_ContainsTag_System_String_" data-uid="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.ContainsTag(System.String)">ContainsTag(String)</h4>
<div class="markdown level1 summary"><p>verify if a node contains a tag</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">bool ContainsTag(string tagName)</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.String</span></td>
<td><span class="parametername">tagName</span></td>
<td></td>
</tr>
</tbody>
</table>
<h5 class="returns">Returns</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Boolean</span></td>
<td></td>
</tr>
</tbody>
</table>
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<h4 id="Lucene_Net_QueryParsers_Flexible_Core_Nodes_IQueryNode_GetChildren" data-uid="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.GetChildren">GetChildren()</h4>
<div class="markdown level1 summary"><p>get Children nodes</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">IList&lt;IQueryNode&gt; GetChildren()</code></pre>
</div>
<h5 class="returns">Returns</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Collections.Generic.IList</span>&lt;<a class="xref" href="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.html">IQueryNode</a>&gt;</td>
<td></td>
</tr>
</tbody>
</table>
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<h4 id="Lucene_Net_QueryParsers_Flexible_Core_Nodes_IQueryNode_GetTag_System_String_" data-uid="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.GetTag(System.String)">GetTag(String)</h4>
<div class="markdown level1 summary"><p>Returns object stored under that tag name</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">object GetTag(string tagName)</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.String</span></td>
<td><span class="parametername">tagName</span></td>
<td></td>
</tr>
</tbody>
</table>
<h5 class="returns">Returns</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Object</span></td>
<td></td>
</tr>
</tbody>
</table>
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<a id="Lucene_Net_QueryParsers_Flexible_Core_Nodes_IQueryNode_RemoveFromParent_" data-uid="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.RemoveFromParent*"></a>
<h4 id="Lucene_Net_QueryParsers_Flexible_Core_Nodes_IQueryNode_RemoveFromParent" data-uid="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.RemoveFromParent">RemoveFromParent()</h4>
<div class="markdown level1 summary"><p>Removes this query node from its parent.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">void RemoveFromParent()</code></pre>
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<a id="Lucene_Net_QueryParsers_Flexible_Core_Nodes_IQueryNode_Set_" data-uid="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.Set*"></a>
<h4 id="Lucene_Net_QueryParsers_Flexible_Core_Nodes_IQueryNode_Set_System_Collections_Generic_IList_Lucene_Net_QueryParsers_Flexible_Core_Nodes_IQueryNode__" data-uid="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.Set(System.Collections.Generic.IList{Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode})">Set(IList&lt;IQueryNode&gt;)</h4>
<div class="markdown level1 summary"><p>reset the children of a node</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">void Set(IList&lt;IQueryNode&gt; children)</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Collections.Generic.IList</span>&lt;<a class="xref" href="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.html">IQueryNode</a>&gt;</td>
<td><span class="parametername">children</span></td>
<td></td>
</tr>
</tbody>
</table>
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<a id="Lucene_Net_QueryParsers_Flexible_Core_Nodes_IQueryNode_SetTag_" data-uid="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.SetTag*"></a>
<h4 id="Lucene_Net_QueryParsers_Flexible_Core_Nodes_IQueryNode_SetTag_System_String_System_Object_" data-uid="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.SetTag(System.String,System.Object)">SetTag(String, Object)</h4>
<div class="markdown level1 summary"><p>Associate the specified value with the specified <code data-dev-comment-type="paramref" class="paramref">tagName</code>. If the <code data-dev-comment-type="paramref" class="paramref">tagName</code>
already exists, the old value is replaced. The <code data-dev-comment-type="paramref" class="paramref">tagName</code> and <code data-dev-comment-type="paramref" class="paramref">value</code> cannot be
null. <code data-dev-comment-type="paramref" class="paramref">tagName</code> will be converted to lowercase.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">void SetTag(string tagName, object value)</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.String</span></td>
<td><span class="parametername">tagName</span></td>
<td></td>
</tr>
<tr>
<td><span class="xref">System.Object</span></td>
<td><span class="parametername">value</span></td>
<td></td>
</tr>
</tbody>
</table>
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<h4 id="Lucene_Net_QueryParsers_Flexible_Core_Nodes_IQueryNode_ToQueryString_Lucene_Net_QueryParsers_Flexible_Core_Parser_IEscapeQuerySyntax_" data-uid="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.ToQueryString(Lucene.Net.QueryParsers.Flexible.Core.Parser.IEscapeQuerySyntax)">ToQueryString(IEscapeQuerySyntax)</h4>
<div class="markdown level1 summary"><p>convert to a query string understood by the query parser</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">string ToQueryString(IEscapeQuerySyntax escapeSyntaxParser)</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><a class="xref" href="Lucene.Net.QueryParsers.Flexible.Core.Parser.IEscapeQuerySyntax.html">IEscapeQuerySyntax</a></td>
<td><span class="parametername">escapeSyntaxParser</span></td>
<td></td>
</tr>
</tbody>
</table>
<h5 class="returns">Returns</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.String</span></td>
<td></td>
</tr>
</tbody>
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<h4 id="Lucene_Net_QueryParsers_Flexible_Core_Nodes_IQueryNode_ToString" data-uid="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.ToString">ToString()</h4>
<div class="markdown level1 summary"><p>for printing</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">string ToString()</code></pre>
</div>
<h5 class="returns">Returns</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.String</span></td>
<td></td>
</tr>
</tbody>
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<h4 id="Lucene_Net_QueryParsers_Flexible_Core_Nodes_IQueryNode_UnsetTag_System_String_" data-uid="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IQueryNode.UnsetTag(System.String)">UnsetTag(String)</h4>
<div class="markdown level1 summary"><p>Unset a tag. <code data-dev-comment-type="paramref" class="paramref">tagName</code> will be converted to lowercase.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">void UnsetTag(string tagName)</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.String</span></td>
<td><span class="parametername">tagName</span></td>
<td></td>
</tr>
</tbody>
</table>
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