| Value | Meaning |
|---|---|
| xz | Lzma with Xz format, suitable to write *.xz files |
| legacy | LZMA1 encoding and format, suitable for legacy *.lzma files This format doesn't support filters. |
| raw | Raw LZMA2 compression, without header/trailer. Use this to include compressed LZMA data in a container defined externally (e.g. this is used for the *.7z archives) |
| rawLegacy | Raw LZMA1 compression, without header/trailer. This one is still found in some *.7z files. |
| rawCopy | Just copy bytes out. You may use this in combination with a filter to observe its effect, but has otherwise no use. |
Header/trailer format for Lzma compression