?um/p1-9Each package manager, platform, type, or ecosystem has its own conventions and protocols to identify, locate, and provision software packages. The package type is the component of a package URL that is used to capture this information with a short string such as maven, npm, nuget, gem, pypi, etc. Known purl type definitions are formalized here independent of the core Package URL specification. See also a candidate list further down.
Definitions can also include types reserved for future use.
The PURL Type JSON Schema is the reference implementation for the Ecma standard.
| Property | Type | Requirement | Description |
|---|---|---|---|
| $id | object | Schema defining the structure and constraints of a specific PURL type | |
| definitions | string | Specifies whether this component is required, optional, or prohibited | |
| character_constraints | string | Regex defining valid characters | |
| case_rules | object | Defines case sensitivity and normalization rules | |
| properties | Determines if case must be preserved or ignored | ||
| normalization | Defines if values must be normalized to lowercase, uppercase, or kept as provided |