IT environment schema

I was looking for an IT environment schema if you like for a new CMDB. I.,e so every individual entitiy in your companies IT setup. 2 obvious categories would be hardware and software, and then hardware could probably sub divided into many categories, but we are more after top level ideas or any examples that already exist in which we can pool our exisiting CI (IT assets). I am not to concerned about software assets and categories (although it would be useful) but need some ideas for splitting hardware assets into logical "groups" and titles for those groups.
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btanExec ConsultantCommented:
You can see from the article, they started off with model where it starts of with s/w and h/w and further dissections such as (parent) CI > Hardware > Computer > Server > Windows I see it as principle to base on can be starting from component to system and to service layers level and the granularity is dependent how deep your asset can be but do not overdo it for manageability standpoint

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