What is the purpose of this file and what generates and updates the contents of it?  I'm guessing JBoss Tools for the visual representation of pages.xml??

<?xml version="1.0" encoding="UTF-8"?>
<diagram model-entity="SeamPagesDiagram">
 <item ID="#ManageEquipment.xhtml" NAME="#xManageEquipment.xhtml"
  PATH="/ManageEquipment.xhtml" SHAPE="24,745,0,0" TYPE="page" model-entity="SeamPagesDiagramItem">
  <output ID="/RepairCaseDetails.xhtml" NAME="output"
   PATH="/RepairCaseDetails.xhtml" TARGET="#xRepairCaseDetails.xhtml" model-entity="SeamPagesDiagramItemOutput"/>
  <output ID="/ManageEquipment.xhtml" NAME="output1"
   PATH="/ManageEquipment.xhtml" TARGET="#xManageEquipment.xhtml" model-entity="SeamPagesDiagramItemOutput"/>
 </item>
 <item ID="#ApplicationMetaData.xhtml"
  NAME="#xApplicationMetaData.xhtml" PATH="/ApplicationMetaData.xhtml"
  SHAPE="24,953,0,0" TYPE="page" model-entity="SeamPagesDiagramItem"/>
 <item ID="org.jboss.seam.framework.EntityNotFoundException"
  NAME="exception:org.jboss.seam.framework.EntityNotFoundException"
  PATH="org.jboss.seam.framework.EntityNotFoundException"
  SHAPE="24,121,0,0" TYPE="exception" model-entity="SeamPagesDiagramItem">
  <output ID="/error.xhtml" NAME="output" PATH="/error.xhtml"
   TARGET="#xerror.xhtml" model-entity="SeamPagesDiagramItemOutput"/>
 </item>
 <item ID="javax.persistence.EntityNotFoundException"
  NAME="exception:javax.persistence.EntityNotFoundException"
  PATH="javax.persistence.EntityNotFoundException" SHAPE="24,225,0,0"
  TYPE="exception" model-entity="SeamPagesDiagramItem">
  <output ID="/error.xhtml" NAME="output" PATH="/error.xhtml"
   TARGET="#xerror.xhtml" model-entity="SeamPagesDiagramItemOutput"/>
 </item>
 <item ID="javax.persistence.OptimisticLockException"
  NAME="exception:javax.persistence.OptimisticLockException"
  PATH="javax.persistence.OptimisticLockException" SHAPE="24,329,0,0"
  TYPE="exception" model-entity="SeamPagesDiagramItem">
  <output ID="/error.xhtml" NAME="output" PATH="/error.xhtml"
   TARGET="#xerror.xhtml" model-entity="SeamPagesDiagramItemOutput"/>
 </item>
 <item ID="org.jboss.seam.security.AuthorizationException"
  NAME="exception:org.jboss.seam.security.AuthorizationException"
  PATH="org.jboss.seam.security.AuthorizationException"
  SHAPE="24,433,0,0" TYPE="exception" model-entity="SeamPagesDiagramItem">
  <output ID="/error.xhtml" NAME="output" PATH="/error.xhtml"
   TARGET="#xerror.xhtml" model-entity="SeamPagesDiagramItemOutput"/>
 </item>
 <item ID="org.jboss.seam.security.NotLoggedInException"
  NAME="exception:org.jboss.seam.security.NotLoggedInException"
  PATH="org.jboss.seam.security.NotLoggedInException" SHAPE="24,849,0,0"
  TYPE="exception" model-entity="SeamPagesDiagramItem">
  <output ID="/login.xhtml" NAME="output" PATH="/login.xhtml"
   TARGET="#xlogin.xhtml" model-entity="SeamPagesDiagramItemOutput"/>
 </item>
 <item ID="javax.faces.application.ViewExpiredException"
  NAME="exception:javax.faces.application.ViewExpiredException"
  PATH="javax.faces.application.ViewExpiredException" SHAPE="24,537,0,0"
  TYPE="exception" model-entity="SeamPagesDiagramItem">
  <output ID="/error.xhtml" NAME="output" PATH="/error.xhtml"
   TARGET="#xerror.xhtml" model-entity="SeamPagesDiagramItemOutput"/>
 </item>
 <item NAME="exception:" SHAPE="24,641,0,0" TYPE="exception" model-entity="SeamPagesDiagramItem">
  <output ID="/error.xhtml" NAME="output" PATH="/error.xhtml"
   TARGET="#xerror.xhtml" model-entity="SeamPagesDiagramItemOutput"/>
 </item>
 <item NAME="#xlogin.xhtml" PATH="/login.xhtml" SHAPE="344,849,0,0"
  TYPE="page" model-entity="SeamPagesDiagramItem"/>
 <item ID="#RepairCaseDetails.xhtml" NAME="#xRepairCaseDetails.xhtml"
  PATH="/RepairCaseDetails.xhtml" SHAPE="344,745,0,0" TYPE="page" model-entity="SeamPagesDiagramItem">
  <output ID="/ManageEquipment.xhtml" NAME="output"
   PATH="/ManageEquipment.xhtml" TARGET="#xManageEquipment.xhtml" model-entity="SeamPagesDiagramItemOutput"/>
 </item>
 <item NAME="#xerror.xhtml" PATH="/error.xhtml" SHAPE="472,17,0,0"
  TYPE="page" model-entity="SeamPagesDiagramItem"/>
 <item ID="#BulkCreateRepairCase.xhtml"
  NAME="#xBulkCreateRepairCase.xhtml" PATH="/BulkCreateRepairCase.xhtml"
  SHAPE="24,1161,0,0" TYPE="page" model-entity="SeamPagesDiagramItem">
  <output ID="/RepairCaseDetails.xhtml" NAME="output"
   PATH="/RepairCaseDetails.xhtml" TARGET="#xRepairCaseDetails.xhtml" model-entity="SeamPagesDiagramItemOutput"/>
 </item>
 <item ID="*" NAME="*" PATH="*" SHAPE="24,1265,0,0" TYPE="page" model-entity="SeamPagesDiagramItem">
  <output ID="/error.xhtml" NAME="output" PATH="/error.xhtml"
   TARGET="#xerror.xhtml" model-entity="SeamPagesDiagramItemOutput"/>
 </item>
 <item ID="#ListManagement.xhtml" NAME="#xListManagement.xhtml"
  PATH="/ListManagement.xhtml" SHAPE="344,977,0,0" TYPE="page" model-entity="SeamPagesDiagramItem">
  <output ID="/ListManagement.xhtml" NAME="output"
   PATH="/ListManagement.xhtml" TARGET="#xListManagement.xhtml" model-entity="SeamPagesDiagramItemOutput"/>
 </item>
</diagram>