# Should XML name or label be unique?

**URL:** https://discourse.paraview.org/t/should-xml-name-or-label-be-unique/16147
**Category:** Development
**Created:** [February 11, 2025, 6:28am UTC](https://discourse.paraview.org/t/should-xml-name-or-label-be-unique/16147 "2025-02-11T06:28:42Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![joint](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/j/dc4da7/32.png) [@joint](https://discourse.paraview.org/u/joint)
#### Post date: [February 11, 2025, 6:28am UTC](https://discourse.paraview.org/t/should-xml-name-or-label-be-unique/16147/1 "2025-02-11T06:28:42Z")

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Should XML name or label be unique?

Thanks

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### Author: ![Lucas\_Givord](https://discourse.paraview.org/user_avatar/discourse.paraview.org/lucas_givord/32/6851_2.png) [@Lucas\_Givord](https://discourse.paraview.org/u/Lucas_Givord)
#### Post date: [February 11, 2025, 8:26am UTC](https://discourse.paraview.org/t/should-xml-name-or-label-be-unique/16147/2 "2025-02-11T08:26:32Z")

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Hello @joint

yes the proxy xml name is unique

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### Author: ![mwestphal](https://discourse.paraview.org/user_avatar/discourse.paraview.org/mwestphal/32/17_2.png) [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [February 11, 2025, 8:30am UTC](https://discourse.paraview.org/t/should-xml-name-or-label-be-unique/16147/3 "2025-02-11T08:30:22Z")

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But the label is not 🙂

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### Author: ![cory.quammen](https://discourse.paraview.org/user_avatar/discourse.paraview.org/cory.quammen/32/11193_2.png) [@cory.quammen](https://discourse.paraview.org/u/cory.quammen)
#### Post date: [February 11, 2025, 3:52pm UTC](https://discourse.paraview.org/t/should-xml-name-or-label-be-unique/16147/4 "2025-02-11T15:52:25Z")

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Labels _should_ be unique because they are used in Python as the basis for identifiers.