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| <path d="m -30.233189,292.45636 c 0,0 0.0052,-0.006 0.01127,-0.001 l 0,0 0,0 0,0 c 0,0 -0.0052,0.006 -0.01127,0.001 z" id="path3654" style="fill:url(#SVGID_10_)" /> |
| </g> |
| <text id="text3761" y="61.094482" x="290" style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:40px;line-height:125%;font-family:Oswald;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" xml:space="preserve"> |
| <tspan y="61.094482" x="290" id="tspan3763">The</tspan> |
| </text> |
| <text id="text3416" y="72.094482" x="356" style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:57.5px;line-height:125%;font-family:Oswald;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" xml:space="preserve"> |
| <tspan y="72.094482" x="356" id="tspan3418">Apache Velocity Project</tspan> |
| </text> |
| <path id="path3557" d="m 897.15,23.54449 0,1.58889 3.72099,0 0,10.51111 1.72469,0 0,-10.51111 3.74815,0 0,-1.58889 -9.19383,0 z m 21.49753,0 -4.15555,8.44691 -4.18272,-8.44691 -2.07778,0 0,12.1 1.58889,0 0,-9.60123 4.11482,8.32469 1.1,0 4.11481,-8.32469 0,9.60123 1.58889,0 0,-12.1 -2.09136,0 z" style="fill:#6d6e71" /> |
| <text id="text3599" y="114.09448" x="400" style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:35px;line-height:125%;font-family:Arial;text-align:start;letter-spacing:0.03em;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" xml:space="preserve"> |
| <tspan y="114.09448" x="400" id="tspan3601">http://velocity.apache.org/</tspan> |
| </text> |
| </svg> |
| </a> |
| |
| </div> |
| <div id="breadcrumb"> |
| <ul><li><a href="http://www.apache.org">apache</a></li><li><a href="/">velocity</a></li><li><a href="/engine/">engine</a></li><li><a href="/engine/2.2/">2.2</a></li><li><a href="#">glossary</a></li></ul> |
| </div> |
| <div id="middle"> |
| <div id="leftnav"> |
| |
| <style type="text/css"> |
| /* The following code is added by mdx_elementid.py |
| It was originally lifted from http://subversion.apache.org/style/site.css */ |
| /* |
| * Hide class="elementid-permalink", except when an enclosing heading |
| * has the :hover property. |
| */ |
| .headerlink, .elementid-permalink { |
| visibility: hidden; |
| } |
| h2:hover > .headerlink, h3:hover > .headerlink, h1:hover > .headerlink, h6:hover > .headerlink, h4:hover > .headerlink, h5:hover > .headerlink, dt:hover > .elementid-permalink { visibility: visible }</style> |
| <h2 id="velocity-engine">Velocity Engine<a class="headerlink" href="#velocity-engine" title="Permanent link">¶</a></h2> |
| <ul> |
| <li><a href="index.html">Welcome</a></li> |
| <li><a href="overview.html">Overview</a></li> |
| <li><a href="getting-started.html">Getting Started</a></li> |
| <li><a href="webapps.html">Web Applications</a></li> |
| <li><a href="/download.cgi#engine">Downloads</a></li> |
| <li><a href="http://wiki.apache.org/velocity/VelocityFAQ">FAQ</a></li> |
| </ul> |
| <h2 id="docs">Docs<a class="headerlink" href="#docs" title="Permanent link">¶</a></h2> |
| <ul> |
| <li><a href="user-guide.html">User Guide</a></li> |
| <li><a href="developer-guide.html">Developer Guide</a></li> |
| <li><a href="vtl-reference.html">VTL Reference</a></li> |
| <li><a href="configuration.html">Configuration</a></li> |
| <li><a href="glossary.html">Glossary</a></li> |
| <li><a href="apidocs/index.html">Javadoc</a></li> |
| <li><a href="upgrading.html">Upgrading</a></li> |
| </ul> |
| <h2 id="developers">Developers<a class="headerlink" href="#developers" title="Permanent link">¶</a></h2> |
| <ul> |
| <li><a href="license.html">License</a></li> |
| <li><a href="changes.html">Changes</a></li> |
| <li><a href="dependencies.html">Dependencies</a></li> |
| <li><a href="source-repository.html">Sources</a></li> |
| <li><a href="build.html">Building</a></li> |
| <li><a href="https://issues.apache.org/jira/browse/VELOCITY">Issues</a></li> |
| <li><a href="http://wiki.apache.org/velocity/RoadMap">Road Map</a></li> |
| <li><a href="http://wiki.apache.org/velocity/CodeStandards">Coding Standards</a></li> |
| <li><a href="http://wiki.apache.org/velocity/DocumentationGuidelines">Doc Guidelines</a></li> |
| </ul> |
| <h2 id="community">Community<a class="headerlink" href="#community" title="Permanent link">¶</a></h2> |
| <ul> |
| <li><a href="http://wiki.apache.org/velocity/">Wiki</a></li> |
| <li><a href="/news.html">News</a></li> |
| <li><a href="http://wiki.apache.org/velocity/PoweredByVelocity">Powered by Velocity</a></li> |
| <li><a href="http://wiki.apache.org/velocity/VelocityEditors">IDE/Editor Plugins</a></li> |
| <li><a href="http://wiki.apache.org/velocity/PublishedArticlesAndBooks">Articles and Books</a></li> |
| <li><a href="/contact.html">Mailing Lists</a></li> |
| </ul> |
| <h2 id="translations-outdated">Translations (outdated)<a class="headerlink" href="#translations-outdated" title="Permanent link">¶</a></h2> |
| <ul> |
| <li><a href="http://www.jajakarta.org/velocity/">Site (Japanese)</a></li> |
| <li><a href="translations/user-guide_fi.html">User's Guide (Finnish)</a></li> |
| <li><a href="translations/user-guide_fr.html">User's Guide (French)</a></li> |
| <li><a href="translations/user-guide_es.html">User's Guide (Spanish)</a></li> |
| </ul> |
| |
| <div id="bottom-nav"> |
| <img src="/images/pbv90x30.png"/> |
| <div id="rss"> |
| <a class="poweredBy" href="/rss/news.rss" title="Velocity News Feed"><img class="poweredBy" alt="Velocity News Feed" src="/images/feed-icon-24x24.jpg"></a> |
| </div> |
| <iframe src="http://www.apache.org/ads/buttonbar.html" style="border-width:0; float: left" frameborder="0" scrolling="no" width="135" height="265"></iframe> |
| </div> |
| </div> |
| <div id="content"><div class="section-content"><style type="text/css"> |
| /* The following code is added by mdx_elementid.py |
| It was originally lifted from http://subversion.apache.org/style/site.css */ |
| /* |
| * Hide class="elementid-permalink", except when an enclosing heading |
| * has the :hover property. |
| */ |
| .headerlink, .elementid-permalink { |
| visibility: hidden; |
| } |
| h2:hover > .headerlink, h3:hover > .headerlink, h1:hover > .headerlink, h6:hover > .headerlink, h4:hover > .headerlink, h5:hover > .headerlink, dt:hover > .elementid-permalink, dt:hover > .elementid-permalink { visibility: visible }</style> |
| <h2 id="velocity-terms-and-abbreviations">Velocity Terms and Abbreviations<a class="headerlink" href="#velocity-terms-and-abbreviations" title="Permanent link">¶</a></h2> |
| <dl> |
| <dt id="anakia">Anakia<a class="elementid-permalink" href="#anakia" title="Permanent link">¶</a></dt> |
| <dd>An XML transformation tool that uses JDOM and Velocity to transform XML documents into the format of your choice.</dd> |
| <dt id="block-directive">Block Directive<a class="elementid-permalink" href="#block-directive" title="Permanent link">¶</a></dt> |
| <dd>A <a href="#directive">directive</a> that spans multiple lines. The block starts with a block directive such as <a href="#if"><code>#if</code></a>, <a href="#foreach"><code>#foreach</code></a>, or <a href="#macro"><code>#macro</code></a> and ends with the <a href="#end"><code>#end</code></a> directive.</dd> |
| <dt id="break">#break<a class="elementid-permalink" href="#break" title="Permanent link">¶</a></dt> |
| <dd>A <a href="#directive">directive</a> that stops the rendering of the current (innermost) <a href="#content-directive">content directive</a> or a specified content directive if the <a href="#scope-control">scope control</a> provided for that content directive is passed to #break as an argument: (e.g. #break($foreach.parent)).</dd> |
| <dt id="comment">Comment<a class="elementid-permalink" href="#comment" title="Permanent link">¶</a></dt> |
| <dd>Allow descriptive text to be included in the template that will not be placed into the output of the template engine. Single line comments begin with <code>##</code>. Multi-line comments begin with <code>#*</code> and end with <code>*#</code></dd> |
| <dt id="content-directive">Content Directive<a class="elementid-permalink" href="#content-directive" title="Permanent link">¶</a></dt> |
| <dd>A <a href="#directive">directive</a> that outputs content when rendering a <a href="#template">template</a>. The default ones automatically have a <a href="#scope-control">scope control</a> made available in the <a href="#context">context</a> during their rendering.</dd> |
| <dt id="context">Context<a class="elementid-permalink" href="#context" title="Permanent link">¶</a></dt> |
| <dd>A means to import Java objects into a <a href="#velocity">Velocity</a><a href="#template">template</a>.</dd> |
| <dt id="directive">Directive<a class="elementid-permalink" href="#directive" title="Permanent link">¶</a></dt> |
| <dd>Easy to use "active" elements that manipulate template output. There are both <a href="#line-directive">line</a> and <a href="#block-directive">block</a> directives.</dd> |
| <dt id="docbook-framework">DocBook Framework<a class="elementid-permalink" href="#docbook-framework" title="Permanent link">¶</a></dt> |
| <dd>A framework inteded to help create high quality documentation suitable for online viewing and printing.</dd> |
| <dt id="dvsl">DVSL<a class="elementid-permalink" href="#dvsl" title="Permanent link">¶</a></dt> |
| <dd>Declarative Velocity Style Language. A tool modeled after XSLT that is used for general XML transformations using the <a href="#vtl">VTL</a> as the templating language.</dd> |
| <dt id="else">#else<a class="elementid-permalink" href="#else" title="Permanent link">¶</a></dt> |
| <dd>A <a href="#directive">directive</a> that must be used with an <code><a href="#if">#if</a></code>. It allows text to be included only if the <code>#if</code> was false.</dd> |
| <dt id="elseif">#elseif<a class="elementid-permalink" href="#elseif" title="Permanent link">¶</a></dt> |
| <dd>A <a href="#directive">directive</a> that must be used with an <a href="#if"><code>#if</code></a>. It allows text to be included if the <code>#if</code> was false and if its own statement is true.</dd> |
| <dt id="equivalence-operator">Equivalence Operator<a class="elementid-permalink" href="#equivalence-operator" title="Permanent link">¶</a></dt> |
| <dd><code>==</code> Used to directly compare numbers, strings, or objects. If the objects that are being compared are different classes, <code>toString()</code> is called first and then they are compared.</dd> |
| <dt id="end">#end<a class="elementid-permalink" href="#end" title="Permanent link">¶</a></dt> |
| <dd>Ends <a href="#block-directive">block directives</a> such as <a href="#if">#if</a>, <a href="#foreach">#foreach</a> and <a href="#macro">#macro</a>.</dd> |
| <dt id="escaping">Escaping<a class="elementid-permalink" href="#escaping" title="Permanent link">¶</a></dt> |
| <dd>Removing the special meaning of a <code>#</code> or <code>$</code> so that you can use these characters without <a href="#velocity">Velocity</a> interpretting it as the start of a <a href="#reference">reference</a> or <a href="#directive">directive</a>. Escaping is done by putting a <code>\</code> character before the <code>#</code> or <code>$</code>.</dd> |
| <dt id="evaluate">#{evaluate<a class="elementid-permalink" href="#evaluate" title="Permanent link">¶</a></dt> |
| <dd>A <a href="#directive">directive</a> which dynamically evaluates a string literal or reference.</dd> |
| <dt id="foreach">#foreach<a class="elementid-permalink" href="#foreach" title="Permanent link">¶</a></dt> |
| <dd>A <a href="#directive">directive</a> that allows you to repeat something on every value in a Collection, Array, Iterable, Map or (as of Velocity 1.6+) object with a <code>public Iterator iterator()</code> method.</dd> |
| <dt id="include">#include<a class="elementid-permalink" href="#include" title="Permanent link">¶</a></dt> |
| <dd>A <a href="#directive">directive</a> that allows the template designer to import a local file, which is then inserted into the location where the <code>#include</code> directive is defined. Multiple files may be included by seperating the file names with commas.</dd> |
| <dt id="identifier">Identifier<a class="elementid-permalink" href="#identifier" title="Permanent link">¶</a></dt> |
| <dd>The name of a <a href="#variable">variable</a>. Identifiers must start with an alphabetic character (a .. z, A .. Z). The rest of the characters are limited to alphabetic, numberic (0 .. 9), hyphens ("-"), and underscores ("_").</dd> |
| <dt id="if">#if<a class="elementid-permalink" href="#if" title="Permanent link">¶</a></dt> |
| <dd>A <a href="#directive">directive</a> that allows for text to only be included if a statement is true.</dd> |
| <dt id="formal-reference-notation">Formal Reference Notation<a class="elementid-permalink" href="#formal-reference-notation" title="Permanent link">¶</a></dt> |
| <dd>A notation for <a href="#reference">references</a> that is more formal than the shorthand. The formal notation consists of a <code>$</code> character followed by a <code>{</code> character and then the identifiers used in the shorthand notation and then a <code>}</code> character. Formal notation is often useful when references are directly adjacent to text in a template.</dd> |
| <dt id="lhs">LHS<a class="elementid-permalink" href="#lhs" title="Permanent link">¶</a></dt> |
| <dd>Left Hand Side of an assignment.</dd> |
| <dt id="line-directive">Line Directive<a class="elementid-permalink" href="#line-directive" title="Permanent link">¶</a></dt> |
| <dd>A <a href="#directive">directive</a> that is done all on one line, such as <a href="#set"><code>#set</code></a>.</dd> |
| <dt id="literal">Literal<a class="elementid-permalink" href="#literal" title="Permanent link">¶</a></dt> |
| <dd>A string enclosed in double quotes.</dd> |
| <dt id="macro">#macro<a class="elementid-permalink" href="#macro" title="Permanent link">¶</a></dt> |
| <dd>See <a href="#Velocimacro">Velocimacro</a>.</dd> |
| <dt id="method">Method<a class="elementid-permalink" href="#method" title="Permanent link">¶</a></dt> |
| <dd>A type of <a href="#reference">reference</a>. Methods are defined in the Java code and are capable of doing something useful. The shorthand notation consists of a leading <code>$</code> character followed by an <a href="#identifier">identifier</a>, folowed by a <a href="#vtl-method-body">VTL Method Body</a>.</dd> |
| <dt id="mvc">MVC<a class="elementid-permalink" href="#mvc" title="Permanent link">¶</a></dt> |
| <dd>Model-View-Controller design pattern. Allows web page designers to focus on creating a well-designed site and allows programmers to focus on writing good code.</dd> |
| <dt>#parse</dt> |
| <dd>A <a href="#directive">directive</a> that includes a local file that contains <a href="#vtl">VTL</a>. <a href="#velocity">Velocity</a> then parses the VTL and renders the template.</dd> |
| <dt id="property">Property<a class="elementid-permalink" href="#property" title="Permanent link">¶</a></dt> |
| <dd>A type of <a href="#reference"">reference</a>. The shorthand notation consists of a leading <code>$</code> character followed by an <a href="#identifier">identifier</a>, followed by a <code>.</code> character and another identifier.</dd> |
| <dt id="quiet-reference-notation">Quiet Reference Notation<a class="elementid-permalink" href="#quiet-reference-notation" title="Permanent link">¶</a></dt> |
| <dd>Another notation for <a href="#reference">references</a>. A <code>!</code> character is inserted between the <code>$</code> and the <a href="#identifier">identifier</a>. This overrides <a href="#velocity">Velocity</a>'s default behavior if the reference is undefined. Normally, if a reference is undefined, the name of the reference that was given is used instead. With this notation, a blank text field is used.</dd> |
| <dt id="reference">Reference<a class="elementid-permalink" href="#reference" title="Permanent link">¶</a></dt> |
| <dd>Begins with <code>$</code> and are used to get something. There are three types: <a href="#variable">variables</a>, <a href="#property">properties</a>, and <a href="#method">methods</a>.</dd> |
| <dt id="resource">Resource<a class="elementid-permalink" href="#resource" title="Permanent link">¶</a></dt> |
| <dd>A general text resource that can be loaded from a variety of sources using a <a href="#resource-loader">Resource Loader</a>.</dd> |
| <dt>Resource Loader</dt> |
| <dd>A class used by a <a href="#velocity-engine">Velocity Engine</a> to load resources from the file system, classpath, URLs or even a database depending on the implementation.</dd> |
| <dt id="rhs">RHS<a class="elementid-permalink" href="#rhs" title="Permanent link">¶</a></dt> |
| <dd>Right Hand Side of an assignment.</dd> |
| <dt id="scope-control">Scope Control<a class="elementid-permalink" href="#scope-control" title="Permanent link">¶</a></dt> |
| <dd>The <a href="#reference">reference</a> automatically provided as a way of scoping/namespacing <a href="#reference">references</a> (to avoid polluting the global <a href="#context">context</a>) within the given content directive and also providing a "label" for <a href="#break">#break</a> to use when breaking out of multiple <a href="#content-directive">content directives</a> at once.</dd> |
| <dt id="set">#set<a class="elementid-permalink" href="#set" title="Permanent link">¶</a></dt> |
| <dd>The <a href="#directive">directive</a> that is used for setting the value of a reference.</dd> |
| <dt id="stop">#stop<a class="elementid-permalink" href="#stop" title="Permanent link">¶</a></dt> |
| <dd>A <a href="#directive">directive</a> that stops the execution of the template engine. <code>#stop</code> is useful for debugging templates.</dd> |
| <dt id="string-interpolation">String Interpolation<a class="elementid-permalink" href="#string-interpolation" title="Permanent link">¶</a></dt> |
| <dd>Using a variable inside of a string. For example, <code>"Hello $name"</code> would be "Hello" and then whatever value is stored in <code>$name</code>.</dd> |
| <dt id="template">Template<a class="elementid-permalink" href="#template" title="Permanent link">¶</a></dt> |
| <dd>A file containing code in a <a href="#template-language">template language</a> such as the <a href="#vtl">VTL</a> that can be run through a <a href="#template-engine">template engine</a> like <a href="#velocity">Velocity</a> to produce dynamic output.</dd> |
| <dt id="template-engine">Template Engine<a class="elementid-permalink" href="#template-engine" title="Permanent link">¶</a></dt> |
| <dd>An engine that merges a <a href="#context">context</a> with a <a href="#template">template</a> to produce output.</dd> |
| <dt id="template-language">Template Language<a class="elementid-permalink" href="#template-language" title="Permanent link">¶</a></dt> |
| <dd>A language such as the <a href="#vtl">VTL</a> that can be used to create <a href="#template">templates</a>.</dd> |
| <dt id="texen">Texen<a class="elementid-permalink" href="#texen" title="Permanent link">¶</a></dt> |
| <dd>Texen is a general purpose text generating utility that is driven by Ant.</dd> |
| <dt id="tool">Tool<a class="elementid-permalink" href="#tool" title="Permanent link">¶</a></dt> |
| <dd>A plain old Java object that is useful in a template but it is not meant to be rendered in output. Tools are meant to be used but not to be seen.</dd> |
| <dt id="turbine">Turbine<a class="elementid-permalink" href="#turbine" title="Permanent link">¶</a></dt> |
| <dd>A servlet based framework that allows experienced Java developers to quickly build web applications. Turbine allows you to personalize the web sites and to use user logins to restrict access to parts of your application.</dd> |
| <dt id="variable">Variable<a class="elementid-permalink" href="#variable" title="Permanent link">¶</a></dt> |
| <dd>A type of <a href="#reference">reference</a>. Variables represents values that can change. The shorthand notation consists of a leading <code>$</code> character followed by an <a href="#identifier">identifier</a>.</dd> |
| <dt id="velocimacro">Velicomacro<a class="elementid-permalink" href="#velocimacro" title="Permanent link">¶</a></dt> |
| <dd>The <a href="#macro"><code>#macro</code></a> <a href="#directive">directive</a> allows designers to define a repeated segment of template. To create a macro "d", you would use <code>#macro(d)</code> followed by the segment of template followed by <a href="#end"><code>#end</code></a>. Macros can have as many arguments as necessary by adding them inside the parentheses such as <code>#macro(d $arg1 $arg2)</code>.</dd> |
| <dt id="velocity">Velocity<a class="elementid-permalink" href="#velocity" title="Permanent link">¶</a></dt> |
| <dd>A Java-based <a href="#template-engine">template engine</a>.</dd> |
| <dt id="velocity-engine">Velocity Engine<a class="elementid-permalink" href="#velocity-engine" title="Permanent link">¶</a></dt> |
| <dd>The engine that generates web pages and other output from <a href="#template">templates</a> containing <a href="#vtl">VTL</a> code.</dd> |
| <dt id="velocity-singleton">Velocity Singleton<a class="elementid-permalink" href="#velocity-singleton" title="Permanent link">¶</a></dt> |
| <dd>A singleton wrapper around a <a href="#velocity-engine">velocity engine</a> that is shared across the JVM (or ClassLoader) and may thus be referenced directly without needing to pass an instance around. This allows localized configuration and sharing of resources.</dd> |
| <dt id="velocitytools">VelocityTools<a class="elementid-permalink" href="#velocitytools" title="Permanent link">¶</a></dt> |
| <dd>A collection of <a href="#tool">Tools</a> and infrastructure to easily, automatically and transparently make tools and static data available to Velocity templates.</dd> |
| <dt id="vtl">VTL<a class="elementid-permalink" href="#vtl" title="Permanent link">¶</a></dt> |
| <dd>Velocity Template Language. The powerful template language that is used with <a href="#velocity">Velocity</a>.</dd> |
| <dt>VTL Method Call</dt> |
| <dd>Consists of an <a href="#identifier">identifier</a> followed by a <code>(</code> character, followed by an optional parameter list, followed by a <code>)</code> character. <a href="#vtl">VTL</a> allows template designers to call any public method declared in a public class on values placed in the <a href="#context">context</a>.</dd> |
| </dl></div></div> |
| <hr/> |
| <div id="copyright"> |
| Copyright © 2020 The Apache Software Foundation, Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>.<br/>Apache and the Apache feather logo are trademarks of The Apache Software Foundation. |
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