# Match sources

You may see the following match sources: **NVD, Alias, Name, CPE, User,** or one of our supported PURL package managers: **PyPI, NPM, NuGet, and Cargo**. If you’re in the **Dependency details** panel, you’ll see any of our supported package managers, **NVD** or **NOT IN NVD**, **Alias, User, Exact, Name, CPE, and System**. You can use these to gauge the strength of a match and your corresponding confidence in the match by the source. 

* **Alias:** This displays if a user on your account created an alias for this software component/version/supplier combo. You can hover over the token for more information on whether the alias was created by a user in this session (Matched by user) or automatically matched by our system (Matched by system).
* **Cargo:** This was exactly matched to a component in the Cargo package manager from a Package URL (PURL) uploaded in your SBOM file.
* **CPE:** This was exactly matched to a component from a CPE string uploaded in your SBOM file. CPE is considered the strongest match.
* **Name:** This dependency name/version/supplier combo exactly matches an existing dependency name/version/supplier combo in our system.
* **NuGet:** This was exactly matched to a dependency in the NuGet package manager from a Package URL (PURL) uploaded in your SBOM file.
* **NPM:** This was exactly matched to a dependency in the NPM package manager from a Package URL (PURL) uploaded in your SBOM file.
* **NVD:** This dependency/version/supplier combo had an exact match in the National Vulnerability Database (NVD).
* **PyPI**: This was exactly matched to a dependency in the PyPI package manager from a Package URL (PURL) uploaded in your SBOM file.
* **User:** This was exactly matched by a user on this account to a possible match suggestion our system provided, or the user created an alias in this session. If the user created an alias in a previous session, that will be considered an automatic match, and will have a **System** token.
* **System:** This was exactly matched to an alias that was created by you or the Helm team.