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If you use In-house (downloaded and installed on your computer), you can change ' built-in patterns for the Email control by editing the ''types.xsd'' file included in the <frevvo installdir>/tomcat/webapps/frevvo.war file. This file includes the email type definition shown below, and you can edit its pattern value. See the example in Phone the phone pattern section below for instructions to modify the types.xsd file.
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