> 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/pipe-spec/symbol-substitution.md).

# Symbol Substitution

If you want PlantSpecDriven to be able to substitute the P\&ID Symbol after you assigned catalog data, you must add an additional property to the Catalog/Pipe Spec. As an example we use **PSD\_PIDSymbolName**. But again, you can choose any name you like. Again, make sure, that you select **All Part Classes** and **Part Family** is selected.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-5263498a8b1efc40f85d17d9ae1dbf9cc29588ca%2FPSD-Config-005.png?alt=media)

You then type in the name of the P\&ID Symbol.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-c3e8324c7f3a84fee2d5dffa1b6ac822ee76bafc%2FPSD-Config-006.png?alt=media)

You must use the exact name of the Symbol from Project Setup. Don't use the block name.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-0b57468426b64902a92eda29c24cfe8830c4460a%2FPSD-Config-010.png?alt=media)

If you now insert for example a general valve...

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-3c1a50f47d70847113cf001d9a2b724779a60e0b%2FPSD-Config-008.png?alt=media)

... you see the choices in the **Part Selection** dialog (the column may also be suppressed, but then it will work also).

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-ca61b15da87e70bd62e70635b6b0e2900ebd5fb9%2FPSD-Config-007.png?alt=media)

When you clicked on **Assign Catalog Data** the General Valve Symbol will be substitutes with the valve Symbol you selected. For example a Butterfly Valve.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-b36034b23ed12df8e1e3d02f3c8f9fdb227e5c8a%2FPSD-Config-009.png?alt=media)