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title: generateBoundary
collection: mulesoft
version: current
locale: en-us
portal_url: https://docs.salesforce.com/mulesoft/current/en-us/dataweave/2.12/dw-multipart-functions-generateboundary.md
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product: DataWeave
version: 2.12
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# generateBoundary

> For the full documentation index, see: https://docs.mulesoft.com/llms.txt

## generateBoundary(len: Number = 70): String

Helper function for generating boundaries in `Multipart` data structures.