<html><head><META http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>5.7.1. Model Element Name</title><link href="style.css" rel="stylesheet" type="text/css"><meta content="DocBook XSL Stylesheets V1.72.0" name="generator"><link rel="start" href="index.html" title="The VIATRA2 Model Transformation Framework"><link rel="up" href="sec_NamingVariables.html" title="5.7. Naming and Variables"><link rel="prev" href="sec_NamingVariables.html" title="5.7. Naming and Variables"><link rel="next" href="def_Variable.html" title="5.7.2. Variable"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table summary="Navigation header" width="100%"><tr><th align="center" colspan="3">5.7.1. Model Element Name</th></tr><tr><td align="left" width="20%"><a accesskey="p" href="sec_NamingVariables.html">Prev</a> </td><th align="center" width="60%">5.7. Naming and Variables</th><td align="right" width="20%"> <a accesskey="n" href="def_Variable.html">Next</a></td></tr></table><hr></div><div class="sect3" lang="en"><div class="titlepage"><div><div><h4 class="title"><a name="def_ModelElementName"></a>5.7.1. Model Element Name</h4></div></div></div><div class="tip" style="margin-left: 0.5in; margin-right: 0.5in;"><table border="0" summary="Tip: Description"><tr><td valign="top" align="center" rowspan="2" width="25"><img alt="[Tip]" src="images/tip.png"></td><th align="left"><a name="def_ModelElementName_Description"></a>Description</th></tr><tr><td valign="top" align="left"><p> | |
A <span class="strong"><strong>model element name</strong></span> | |
<a name="N12DD6" class="indexterm"></a> | |
is the name of an element in the model space. | |
</p></td></tr></table></div><div class="important" style="margin-left: 0.5in; margin-right: 0.5in;"><table border="0" summary="Important: Syntax"><tr><td valign="top" align="center" rowspan="2" width="25"><img alt="[Important]" src="images/important.png"></td><th align="left"><a name="def_ModelElementName_Syntax"></a>Syntax</th></tr><tr><td valign="top" align="left"><pre class="programlisting"> | |
QualifiedTypeNameAST ::= TypeNameAST | |
| QualifiedTypeNameAST <span class="token">.</span> TypeNameAST | |
TypeNameAST ::= <a href="def_NameLiteral.html" title="6.2.2. Name Literal">NameLiteral</a> | |
| <a href="def_Identifier.html" title="6.2.1. Identifier">IDENTIFIER</a> | |
| <a href="def_UpperCaseLiteral.html" title="6.2.3. UpperCase Literal">UpperCaseLiteral</a> | |
| <a href="def_VTCLKeywords.html" title="6.1.2. Keywords">KeywordAsIdentifier</a> | |
ValueQualifiedNameAST ::= ValueLocalNameAST | |
| QualifiedTypeNameAST <span class="token">.</span> TypeNameAST | |
ValueLocalNameAST ::= <a href="def_NameLiteral.html" title="6.2.2. Name Literal">NameLiteral</a> | |
| <a href="def_Identifier.html" title="6.2.1. Identifier">IDENTIFIER</a> | |
</pre><p> | |
A model element is identified by its name. A <span class="strong"><strong>model element name</strong></span> | |
can contain arbitrary ASCII characters except apostrophes (single quotation | |
marks) since the sequence of characters must be inserted between single | |
quotation marks. The single quotation marks are not part of the name. The | |
quotation marks can be omitted if the name starts with a letter (either | |
upper case or lower case) and contains only alphanumeric characters. | |
</p><p> | |
A <span class="strong"><strong>qualified model element name</strong></span> is a sequence of | |
<span class="strong"><strong>local model element names</strong></span> separated with dots. | |
</p></td></tr></table></div><div class="note" style="margin-left: 0.5in; margin-right: 0.5in;"><table border="0" summary="Note: Semantics"><tr><td valign="top" align="center" rowspan="2" width="25"><img alt="[Note]" src="images/note.png"></td><th align="left"><a name="def_ModelElementName_Semantics"></a>Semantics</th></tr><tr><td valign="top" align="left"><p> | |
The <span class="emphasis"><em>fully qualified name</em></span> is a <span class="strong"><strong>model element name</strong></span> that | |
consists of all containers of the model element according to the | |
containment hierarchy starting from a child of the root element. | |
</p><p> | |
When defining a <a href="def_Machine.html" title="1.2.1. GTASM Machine Definition">machine</a>, an <a href="def_AsmRuleDef.html" title="4.1.1. ASM Rule Definition">ASM rule</a>, | |
an <a href="def_AsmFunctionDef.html" title="5.5.1. ASM Function Definition">ASM function</a>, a <a href="def_GraphPatternDef.html" title="2.1.1. Graph Pattern Definition">graph pattern</a> or | |
a <a href="def_GTRuleDef.html" title="3.1.1. Graph Transformation Rule Definition">graph transformation rule</a>, their names are always defined as <span class="emphasis"><em>local names</em></span>, while | |
their namespace is defined globally in the <a href="def_VtclFile.html" title="1.1.1. VTCL file">VTCL file</a> in a | |
<a href="def_NamespaceDefinition.html" title="1.1.2. Namespace Definition">namespace definition</a>. | |
</p><p> | |
The <span class="emphasis"><em>local name</em></span> of a model element can be used in | |
the type of an <a href="def_Entity.html" title="2.2.1. Entity">entity</a> or | |
<a href="def_Relation.html" title="2.2.2. Relation">relation</a> if the containment hierarchy of | |
the referred model element (i.e. the type) is imported by a | |
<a href="def_NamespaceImport.html" title="1.1.3. Namespace Import">namespace import</a>. | |
</p></td></tr></table></div><div class="highlights"><a name="def_ModelElementName_Remark"></a><p><b>Remark. </b> | |
Note that name constants starting with an upper-case initial may clash with | |
variables in ASM programs. In case of such a conflict, the name constants | |
have to be surrounded with apostrophes ('). | |
In other terms, in ASM programs, all upper case literals and reserved words | |
should be quoted between apostrophes, when used as a model element constant as a local name. | |
</p></div><div class="highlights"><a name="def_ModelElementName_UsedBy"></a><p><b>Used By: </b> | |
<a href="def_NamespaceDefinition.html" title="1.1.2. Namespace Definition">namespace definition</a>, | |
<a href="def_NamespaceImport.html" title="1.1.3. Namespace Import">namespace import</a>, | |
<a href="def_GTRuleDef.html" title="3.1.1. Graph Transformation Rule Definition">GT rule definition</a>, | |
<a href="def_GTRuleCall.html" title="3.4.1. GTRule Call">GT rule invocation</a>, | |
<a href="def_GraphPatternDef.html" title="2.1.1. Graph Pattern Definition">graph pattern definition</a>, | |
<a href="def_GraphPatternCall.html" title="2.1.4. Graph Pattern Call">graph pattern call</a>, | |
<a href="def_AsmRuleDef.html" title="4.1.1. ASM Rule Definition">ASM rule definition</a>, | |
<a href="def_CallRule.html" title="4.2.2. Call Rule">Call rule (ASM rule invocation)</a>, | |
<a href="def_AsmFunctionDef.html" title="5.5.1. ASM Function Definition">ASM function definition</a>, | |
<a href="def_AsmFunctionLocation.html" title="5.5.3. ASM Function Location">ASM function location</a>, | |
<a href="def_PredefinedFunctionCall.html" title="5.6.1. Predefined Function Call">predefined function call</a>, | |
<a href="def_Entity.html" title="2.2.1. Entity">entity type</a>, | |
<a href="def_Relation.html" title="2.2.2. Relation">relation type</a> | |
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