The <pluginUI> element has the following attributes:
menuItem – The text to display in the menu of the browser interface. The name should be 20 characters or less in length, although the actual character limit is defined by the attribute type.
tooltip(optional) – The tooltip to display for the menu item in the browser interface. The menuItem includes the icon, if you choose to provide an icon.
xmlns:xsi – Required value: http://www.w3.org/2001/XMLSchema-instance
xsi:schemaLocation (optional) – Recommended value: http://www.sun.com/schema/SPS pluginUI.xsd
schemaVersion – The version of the pluginUI.xsd schema being used. The only value currently permitted is 5.0.