> For the complete documentation index, see [llms.txt](https://docs.sealsecurity.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.sealsecurity.io/reference/naming-and-versioning/per-ecosystem.md).

# Per-ecosystem nuances

The `sp[N]` suffix maps onto each ecosystem's version-string syntax. The table below uses `$version` for the origin version and `$X` for the iteration number.

| Ecosystem  | Origin name            | Sealed version      |
| ---------- | ---------------------- | ------------------- |
| Java       | `$groupId:$artifactId` | `$version+sp$X`     |
| JavaScript | `$name`                | `$version-sp$X`     |
| Python     | `$name`                | `$version+sp$X`     |
| Go         | `$name`                | `$version-sp$X`     |
| Ruby       | `$name`                | `$version.0.1.sp$X` |
| Debian     | `$name`                | `$version+sp$X`     |
| RPM        | `$name`                | `$version+sp$X`     |
| Alpine     | `$name`                | `$version-r$REV`    |

**Alpine and the `-r$REV` revision.** Alpine versioning does not append an `sp` suffix. Sealed iterations advance through the package-revision field (`r$REV`) by prepending zeros to the original revision: an origin at `8.45-r3` produces sealed iterations `8.45-r03`, `8.45-r003`, `8.45-r0003`, and so on. This keeps the version string monotonically newer than the origin under apk's version comparator while encoding the iteration count.

## Maven extras

The Seal Artifact Server understands two Maven-only suffixes a customer can type directly in the POM:

* `+safest`: resolves at request time to the safest sealed iteration of the origin version.
* `+safest-until-<cutoff>`: resolves to the safest sealed iteration Seal had published by `<cutoff>`, where `<cutoff>` is a compact ISO 8601 timestamp (`YYYYMMDDTHHMMSSZ`).

Both are documented in [Maven-specific server features](/setup-apps-os/artifact-server/maven-server-features.md).

## Equality and ordering

A sealed iteration compares greater than the bare origin version under each ecosystem's native version comparator. A manifest pin that targets exactly `2.7.4` (`=2.7.4`, `==2.7.4`, `~=`, and so on) does not match a sealed iteration unless loosened to accept the sealed form.

## Related

* [The `-sp[N]` model](/reference/naming-and-versioning/sp-model.md)
* [Renamed packages](/reference/naming-and-versioning/renamed-packages.md)
* [Maven-specific server features](/setup-apps-os/artifact-server/maven-server-features.md)