I want alias of the key for items using macros.

For example,

HostA has an itemA.
ItemA use macro

{HOST.HOST}.
HostB has an itemB.
ItemB is an aggregate checks type item. The key of itemB is grpsum["Group name","Key of itemA",last,0].
ItemB has error, because {HOST.HOST}

in the key of itemA is expanded hostB.

So I create the calculated item for itemA's alias, itemC and use itemC in itemB.
It's OK but it is a waste of resources.