extends 

0 or 1 

The base component from which this component is derived. 

varList 

0 or 1 

List of substitution variables used by this component and the configuration resources it contains.  

resourceRef 

0 or 1 

Resources managed by this simple component. May not be used with <componentRefList>. 

component RefList 

0 or 1  

List of components referenced by this composite component. May not be used with <resourceRef>. 

installList 

0 or 1 1 

List of install step blocks, each providing a different way to install this component. 

uninstallList 

0 or 1 1 

List of uninstall step blocks, each providing a different way to uninstall this component. 

snapshotList 

0 or 1 

List of snapshot blocks, each providing a different way to capture the installed state of this component. 

controlList 

0 or 1 

List of controls that are available for this component. 

diff 

0 or 1 

List of directives used by the difference engine when running comparisons on components derived from this component.