> For the complete documentation index, see [llms.txt](https://help.auxalia.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.auxalia.com/plant-tools/plantexpresstools/collaboration-workflows/assemblies.md).
# Assemblies
This chapter lists the workflows and how the files of the Assemblies function are handled in a Collaboration (BIM360 / **A**utodesk **C**onstruction **C**loud) environment.
Configurations Files for Assemblies
These are the files used by PlantLink
1. **Assemblies.xml** This file exist in each project (\[PROJCTFOLDER]\ACPlantTools\PlantExpressTools\Assemblies\Assemblies.xml). In the project, all settings from the Settings dialog are stored. 
2. **Files in Project Manager** 
Opening/Downloading an existing Collaboration project
This is handled if the project doesn't exist in the work folder yet and everything needs to be downloaded from scratch.
1. Assemblies.xml => DOWNLOADED
Sharing an existing project (which already has an Assemblies.xml) to ACC
When sharing a project with an Assemblies.xml file the following files are handled:
1. Assemblies.xml => CHECKED IN
Settings (Opening PlantExpressTools)
If you open the PlantExpressTools Settings Dialog the following files are handled:
1. PlantToolsSetup.xml => CHECKED OUT
Closing PlantExpressTools Settings
If you close the PlantExpressTools Settings Dialog the following files are handled:
1. Assemblies.xml => CHECKED IN
2. PlantToolsSetup.xml => CHECKED IN
Selecting Assemblies Tab
If you select the Assemblies tab the following files are handled:
1. Assemblies.xml => CHECKED OUT
Create Assembly Classes and Properties
If you click on the Assemblies button the first time, the Assembly classes and properties will be created.
This will check out the Plant 3D Project Setup, add/update classes add/update properties, check in Project Setup.
