> 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/use-cases/editing-line-segment-properties-pid/inserting-symbols-pid/understanding-assigning-pipe-spec-data-pid/updating-assigned-data-on-specsize-change.md).

# Updating assigned data on Spec/Size change

This chapter describes how the already assigned Pipe Spec data in a symbol are updated.

Let's start with the following example where we have the check valve in size 100.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-abb97dad124aa82bbba65c7e7eeb49499ce62998%2FUse-Cases-0145.png?alt=media)

And here we see the data for one of the flanges.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-26b6b4c0ebf36c3fad96449e3aa35d3f69db681f%2FUse-Cases-0141.png?alt=media)

When you change spec or size in a symbol (this applies to the flanges and fasteners too), PlantSpecDriven checks if the already assigned **Long Description (Family)** exists in the new spec/size combination as well (see [Page 12 - Assign Catalog - Port Properties](/plant-tools/plantspecdriven/how-to-use/configuration/the-wizard/spec-driven-lines-symbols/page-12-assign-catalog-port-properties.md)).

Notice the Long Description (Family) in the assigned pipe spec data.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-f6952f60144b8eac238c6c773429df4be2169f6c%2FUse-Cases-0142.png?alt=media)

Now we change the size to 50.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-3e7a2bc724b3f7f93cf3508f36120ff2fe8f08f3%2FUse-Cases-0143.png?alt=media)

In the updated data we still see the same **Long Description (Family)**, but the **Long Description (Size)** has been updated.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-cbcc3bcacf5b88b4ad8fa97ac9a44599d0f0ac3c%2FUse-Cases-0144.png?alt=media)