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| <h1 class="topictitle1">Adding pattern facets to simple types</h1> |
| |
| |
| |
| |
| <div><p>A pattern facet can be used to constrain the value of a type's |
| lexical space (the set of string literals that represent the values of a type), |
| which indirectly constrains the value space.</p> |
| |
| <div class="section"><p> The value of the pattern is called a regular expression. You |
| can specify it using the <span class="uicontrol">Regular Expression</span> wizard.</p> |
| <p>To |
| add a pattern to a simple type, complete the following steps:</p> |
| </div> |
| |
| <ol> |
| <li class="stepexpand"><span>In the Design view, select the simple type you want to work with.</span> |
| </li> |
| |
| <li class="stepexpand"><span>In the Properties view, click the <span class="uicontrol">Constraints</span> tab, |
| then <span class="uicontrol">Patterns</span>.</span></li> |
| |
| <li class="stepexpand"><span>Click <span class="uicontrol">Add</span>.</span> The Regular Expression |
| wizard opens.</li> |
| |
| <li class="stepexpand"><span>Select the token you want to add to the expression.</span></li> |
| |
| <li class="stepexpand"><span>Indicate how often you want the token to appear in order for a |
| match to succeed:</span> |
| <ul> |
| <li>If you want the token to repeat, click <span class="uicontrol">Repeat</span> and |
| specify the number of times the token must appear.</li> |
| |
| </ul> |
| |
| <ul> |
| <li> If you want to specify a minimum and maximum number of times the |
| token can appear, click <span class="uicontrol">Range</span> and enter a minimum and |
| maximum value.</li> |
| |
| </ul> |
| |
| </li> |
| |
| <li class="stepexpand"><span>To add the token to the regular expression, click <span class="uicontrol">Add</span>. </span> |
| </li> |
| |
| <li class="stepexpand"><span>To create the entire expression, repeat steps 4 - 6 as necessary.</span> |
| </li> |
| |
| <li class="stepexpand"><span>When you are finished, click <span class="uicontrol">Next</span>.</span> |
| </li> |
| |
| <li class="stepexpand"><span>To test against the regular expression and see if |
| a match occurs, enter sample text.</span></li> |
| |
| <li class="stepexpand"><span>Click <span class="uicontrol">Finish</span>.</span> The regular |
| expression will appear in the Patterns page. <div class="tip"><span class="tiptitle">Tip:</span> To edit an |
| existing pattern, select it in the Patterns page and click <span class="uicontrol">Edit</span>. |
| To delete an existing pattern, select it in the Patterns page and click <span class="uicontrol">Delete</span>. </div> |
| |
| </li> |
| |
| </ol> |
| |
| </div> |
| |
| <div><div class="reltasks"><strong>Related tasks</strong><br /> |
| <div><a href="../topics/taddsmpt.html" title="Simple types are used to create derived datatypes. They provide a set of constraints on the value space (a set of values) and the lexical space (a set of valid literals) of a datatype.">Adding simple types</a></div> |
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