# Incorrect diagrams on IfcCostItem

**URL:** <https://forums.buildingsmart.org/t/incorrect-diagrams-on-ifccostitem/3552>\
**Category:** Developers\
**Created:** [April 26, 2021, 8:04am UTC](https://forums.buildingsmart.org/t/incorrect-diagrams-on-ifccostitem/3552 "2021-04-26T08:04:56Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Moult](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.buildingsmart.org/moult/32/196_2.png) [@Moult](https://forums.buildingsmart.org/u/Moult)\
**Post date:** [April 26, 2021, 8:04am UTC](https://forums.buildingsmart.org/t/incorrect-diagrams-on-ifccostitem/3552/1 "2021-04-26T08:04:56Z")

</div>

This diagram seems to have a few inaccuracies. Nothing major, but would be good to resolve.

`CostType` should be `Category`. Also, `IfcAppliedValueRelationship` does not exist, it should be `ArithmeticOperator`.

 ![image](https://us1.discourse-cdn.com/flex016/uploads/buildingsmart1/original/2X/c/ceb9ab04cc9b6c73eb1b78cd32f26298bde6a74e.png)