biblatex-sp-unified is an opinionated BibLaTeX implementation of the Unified Stylesheet for Linguistics Journal. The stylesheet was developed by CELxJ, the Committee of Editors of Linguistics Journals. There is a standard BibTeX implementation, called unified.bst, which was developed by Bridget Samuels, based on work done for the house-style of the journal Semantics and Pragmatics (S&P). This project is a ground-up re-implementation in modern BibLaTeX. It is now being used by S&P in production.