42 package registries

How identity is spelled in each registry: whether a namespace is required, what case-folds, and where it resolves by default. Two names that differ only in case are the same package in some registries and not in others, which is the kind of thing that is only a bug once you have shipped it.

purl type	registry	namespace	name	default repository
`pkg:apk`	APK-based packages	required, case-folded	required, case-folded	—
`pkg:alpm`	Arch Linux package	required, case-folded	required, case-folded	—
`pkg:bazel`	Bazel modules	prohibited, case-sensitive	required, case-sensitive	`https://bcr.bazel.build`
`pkg:otp`	BEAM/OTP Application	prohibited, case-sensitive	required, case-folded	—
`pkg:bitbucket`	Bitbucket	required, case-folded	required, case-folded	`https://bitbucket.org`
`pkg:bitnami`	Bitnami	prohibited, case-sensitive	required, case-folded	`https://downloads.bitnami.com/files/stacksmith`
`pkg:cargo`	Cargo	prohibited, case-sensitive	required, case-sensitive	`https://crates.io/`
`pkg:chrome-extension`	Chrome Browser Extensions	prohibited, case-sensitive	required, case-folded	`https://chromewebstore.google.com/`
`pkg:cocoapods`	CocoaPods	prohibited, case-sensitive	required, case-sensitive	`https://cdn.cocoapods.org/`
`pkg:composer`	Composer	required, case-folded	required, case-folded	`https://packagist.org`
`pkg:conan`	Conan C/C++ packages	optional, case-sensitive	required, case-sensitive	`https://center.conan.io`
`pkg:conda`	Conda	prohibited, case-sensitive	required, case-sensitive	`https://repo.anaconda.com`
`pkg:cpan`	CPAN	optional, case-sensitive	required, case-sensitive	`https://www.cpan.org/`
`pkg:cran`	CRAN	prohibited, case-sensitive	required, case-sensitive	`https://cran.r-project.org`
`pkg:deb`	Debian package	required, case-folded	required, case-folded	—
`pkg:docker`	Docker image	optional, case-sensitive	required, case-sensitive	`https://hub.docker.com`
`pkg:generic`	Generic Package	optional, case-sensitive	required, case-sensitive	—
`pkg:git`	Git	required, case-sensitive	required, case-sensitive	—
`pkg:github`	GitHub	required, case-folded	required, case-folded	`https://github.com`
`pkg:golang`	Go package	required, case-sensitive	required, case-sensitive	—
`pkg:hackage`	Haskell package	prohibited, case-sensitive	required, case-sensitive	`https://hackage.haskell.org`
`pkg:hex`	Hex	optional, case-folded	required, case-folded	`https://repo.hex.pm`
`pkg:brew`	Homebrew	optional, case-folded	required, case-folded	`https://formulae.brew.sh/`
`pkg:huggingface`	HuggingFace models	required, case-sensitive	required, case-sensitive	—
`pkg:julia`	Julia Package	prohibited, case-sensitive	required, case-sensitive	`https://github.com/JuliaRegistries/General`
`pkg:luarocks`	LuaRocks	optional, case-folded	required, case-folded	—
`pkg:maven`	Maven	required, case-sensitive	required, case-sensitive	`https://repo.maven.apache.org/maven2/`
`pkg:mlflow`	MLflow	prohibited, case-sensitive	required, case-sensitive	—
`pkg:npm`	Node NPM packages	optional, case-sensitive	required, case-sensitive	`https://registry.npmjs.org/`
`pkg:nuget`	NuGet	prohibited, case-sensitive	required, case-sensitive	`https://www.nuget.org`
`pkg:oci`	OCI image	prohibited, case-sensitive	required, case-folded	—
`pkg:opam`	Opam package	prohibited, case-sensitive	required, case-sensitive	`https://opam.ocaml.org`
`pkg:pub`	Pub	prohibited, case-sensitive	required, case-folded	`https://pub.dartlang.org`
`pkg:pypi`	PyPI	prohibited, case-sensitive	required, case-folded	`https://pypi.org`
`pkg:qpkg`	QNX package	required, case-folded	required, case-sensitive	—
`pkg:rpm`	RPM	required, case-folded	required, case-sensitive	—
`pkg:gem`	RubyGems	prohibited, case-sensitive	required, case-sensitive	`https://rubygems.org`
`pkg:swid`	Software Identification (SWID) Tag	optional, case-sensitive	required, case-sensitive	—
`pkg:swift`	Swift packages	required, case-sensitive	required, case-sensitive	—
`pkg:vcpkg`	Vcpkg C/C++ packages	prohibited, case-sensitive	required, case-sensitive	`https://github.com/microsoft/vcpkg/`
`pkg:vscode-extension`	VS Code Extension packages	required, case-folded	required, case-folded	`https://marketplace.visualstudio.com/vscode-extension`
`pkg:yocto`	Yocto Project	optional, case-folded	required, case-sensitive	—