> For the complete documentation index, see [llms.txt](https://datashapes.gitbook.io/primer/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://datashapes.gitbook.io/primer/revit/modificationtracker.parameterchanges.md).

# ModificationTracker.ParameterChanges

## 1. Description

This node compares string “Snapshots” of the parameters of the elements that exist in both DocumentA and DocumentB. Like the GeometryChanges node, it will return changed and unchanged elements in separate lists.

![](/files/-LZYplDhjLg5chNAfSoE)