The Package URL (PURL) specification is an open standard for uniquely identifying software packages across different ecosystems. A PURL is a specially formatted URL that describes a software package's location or identity in a package registry. How PURL WorksA Package URL is structured similarly to a web URL, with multiple components separated by specific symbols. In SPDX v2.2 and later, Package URLs can be included as an External Reference of type: purl on a package entry. PURL: The Bottom LineThe Package URL (PURL) specification plays an important role in standardizing how developers and organizations identify and manage software components.