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The hyperlink reference properties can also be set for links to do things like 'mailto:' or 'click to call':
In this example, setting the hyperlink reference will open your native email client to send an email to the specified 'mailto:' recipient. This can also be applied in mobile applications with the 'click to call' example where when the hyperlink is clicked the phone number will be sent to the devices dialer to place a call to the specified number.
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To do this, simply place a valid URL in the hyperlink reference property and set the target if you wish to open the link somewhere other than the default.
In this example the URL would open in a new window or tab.
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