# Alloy Authors - Practical Alloy - Sequences (Highlights) ![rw-book-cover|256](https://readwise-assets.s3.amazonaws.com/static/images/article4.6bc1851654a0.png) ## Metadata **Review**:: [readwise.io](https://readwise.io/bookreview/51387539) **Source**:: #from/readwise #from/reader **Zettel**:: #zettel/fleeting **Status**:: #x **Authors**:: [[Alloy Authors]] **Full Title**:: Practical Alloy - Sequences **Category**:: #articles #readwise/articles **Category Icon**:: 📰 **URL**:: [practicalalloy.github.io](https://practicalalloy.github.io/chapters/behavioral-topics/topics/sequences/index.html) **Host**:: [[practicalalloy.github.io]] **Highlighted**:: [[2025-05-13]] **Created**:: [[2025-05-14]] ## Highlights - Sequences can only be used in fields, meaning they must be used as signature attributes. To declare an attribute that is a sequence, the keyword `seq` must be used, followed by the signature whose atoms can be contained in it. ([View Highlight](https://read.readwise.io/read/01jv5w9g3dnfnvgqe15w98jy8x)) ^889243568