The JPIPRoot element is used as a subelement of the Globals element to alert Express Server to the presence of a JPIP server. It identifies the location of the JPIP server, making catalogued JPIP (streaming JPEG 2000) imagery visible to the browse command. Unless you choose not to install the JPIP server, this property is set by default upon installation.
Example of the JPIPRoot element:
<JPIPRoot>http://STTL-DEV-GUPPY.seattle.mycompany.local:9013/</JPIPRoot>