<doc>
  <legacy_id>1873</legacy_id>
  <name>propertyNames</name>
  <type>function</type>
  <syntax>
    <example>the propertyNames</example>
    <example>propertyNames()</example>
  </syntax>
  <library></library>
  <objects>
  </objects>
  <synonyms>
  </synonyms>
  <classification>
    <category>Writing LiveCode</category>
    <category>Values &amp; Properties</category>
  </classification>
  <references>
    <function tag="functionNames">functionNames Function</function>
    <control_st tag="setProp">setProp Control Structure</control_st>
    <function tag="colorNames">colorNames Function</function>
    <function tag="commandNames">commandNames Function</function>
    <function tag="constantNames">constantNames Function</function>
    <property tag="customProperties">customProperties Property</property>
    <property tag="properties">properties Property</property>
  </references>
  <history>
    <introduced version="1.0">Added.</introduced>
  </history>
  <platforms>
    <mac/>
    <windows/>
    <linux/>
    <ios/>
    <android/>
  </platforms>
  <classes>
    <desktop/>
    <server/>
    <web/>
    <mobile/>
  </classes>
  <security>
  </security>
  <summary><glossary tag="return">Returns</glossary> a list of all built-in <property tag="properties">properties</property> in <glossary tag="LiveCode">LiveCode</glossary>.</summary>
  <examples>
    <example>the propertyNames</example>
    <example>if it is among the lines of the propertyNames then beep</example>
  </examples>
  <description>
    <p>Use the <b>propertyNames</b> <control_st tag="function">function</control_st> to check whether a particular <glossary tag="property">property</glossary> already exists in <glossary tag="LiveCode">LiveCode</glossary>, to avoid using a <glossary tag="reserved word">reserved word</glossary> for your own <property tag="customProperties">custom properties</property>.</p><p/><p><b>Value:</b></p><p>The <b>propertyNames</b> <control_st tag="function">function</control_st> <glossary tag="return">returns</glossary> a list of <glossary tag="property">property</glossary> names, one per <keyword tag="line">line</keyword>.</p><p/><p><b>Comments:</b></p><p>The <b>propertyNames</b> <control_st tag="function">function</control_st> <glossary tag="return">returns</glossary> all the <property tag="properties">properties</property> that can be used in <glossary tag="LiveCode">LiveCode</glossary>, including synonyms.</p>
  </description>
</doc>