> 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/plantspecdriven/how-to-use/configuration/relationships.md).

# Relationships

This chapter is required only if you want to use Fasteners (e.g. Gaskets). Fasteners will be related to a Flanges (or other end connecting symbols) or other Inline Assets/Instruments.

Here is an example on how this can look like in the [Using Structure Tree](/plant-tools/plantspecdriven/how-to-use/use-cases/routing-pid-line-segments-3d.md) chapter.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-16bd4b1f9474ae7cec31ae84784533f530316c42%2FPSD-Config-040.png?alt=media)

In order to be able to create the relationship between Inline Assets and Fasteners you first need to configure PlantSpecDriven with [The Wizard](/plant-tools/plantspecdriven/how-to-use/configuration/the-wizard.md) otherwise you cannot open the Structure Tree palette.

After you have configured PlantSpecDriven the [Using Structure Tree](/plant-tools/plantspecdriven/how-to-use/use-cases/routing-pid-line-segments-3d.md) is automatically opened. If this is not the case, you can open the [Using Structure Tree](/plant-tools/plantspecdriven/how-to-use/use-cases/routing-pid-line-segments-3d.md) by clicking on the toggle button in the ribbon of PlantSpecDriven.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-6077176bbefb448c3e82598bb4e79a016cd7db41%2FPSD-Config-045.png?alt=media)

In the Structure Tree palette you expand the menu in the upper right hand corner and click on **Edit Relationship Types**.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-aa485496bf4e78e72de45e6244c1e55934f6ab2f%2FPSD-Config-041.png?alt=media)

This opens the **Relationship types** dialog where you can add additional relationships. Here you click on **New\...**.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-4a3c6ce56157ab606897f8861cc1e5d56d6e3f4d%2FPSD-Config-042.png?alt=media)

Now you select **Inline Assets** on the left and **PSD\_Fasteners** (or whatever class name you choose) on the right.

Remark: The reason for selecting Inline Assets and not Hand Valves is, that the Fasteners will later be related to a Hand Valve, or a Piping Fitting (this is where our Flanges are), or a Piping Specialty Item. By using Inline Assets we have the highest flexibility. Otherwise we would need to create multiple Relationship types.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-1c801acd4a0447b1b2fbc9d69621d36d5ce67b89%2FPSD-Config-043.png?alt=media)

After clicking on OK we see the new Relationship type in the dialog.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-6a1de64e70ae1af4a88f6ef3a64c6acbfb6e6141%2FPSD-Config-044.png?alt=media)

If you use also symbols from the Inline Instruments class you need a second relationship type.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-4350e024f4faedff596b91d1c173a08d5352d642%2FPSD-Config-050.png?alt=media)

This time between the **Inline Instruments** class and again the **PSD\_Fasteners** class.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-d592023a2ddf15b0f13e3140dce34594f6141741%2FPSD-Config-051.png?alt=media)

If you are done you click **OK**.