# Semantic model

**URL:** <https://community.openhab.org/t/semantic-model/112684>\
**Category:** Misc\
**Created:** [January 3, 2021, 12:01pm UTC](https://community.openhab.org/t/semantic-model/112684 "2021-01-03T12:01:26Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![Raven](https://community.openhab.org/letter_avatar_proxy/v4/letter/r/9fc348/32.png) [@Raven](https://community.openhab.org/u/Raven)\
**Post date:** [January 4, 2021, 9:25am UTC](https://community.openhab.org/t/semantic-model/112684/2 "2021-01-04T09:25:20Z")

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Hi there,

the semantic model isn’t really new but has been implemented in late 2018 i think.  
you can read about it here: [habot and semantics](https://community.openhab.org/t/habot-walkthrough-2-n-semantic-tagging-item-resolving/55651)

to me one paragraph is very important:

> According to the schema, currently you can only tag an item with one of the Location, Equipment or Point tags, but you can combine a Point tag and a Property tag on the same item.

Tagging works in the (3.x) UI and in textual configuration, also be aware there are more taggings available e.g. amazon/alexa stuff.

AFAIK openHAB is using the Eclipse SmartHome semantics/ontology so the only way to enhance/extend/add tags is to do it on the ESH side…

Regards  
T.

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