# Decompression and parsing

> [!note] Tato stránka ještě není přeložena do češtiny a zobrazuje se anglicky.


The `Data` byte array of the [File Header](rhopoint-elements-hub-rae-file-format-file-header.md) may be compressed using the `gzip` algorithm. Once decompressed, it is a CBOR container holding a collection of [MeasurementComponentMetaTuple](rhopoint-elements-hub-rae-file-format-measurementcomponentmetatuple.md) objects.

### Steps to parse an RAE file

1. **Validate** the magic string and version byte at the start of the file (see [File Identification](rhopoint-elements-hub-rae-file-format-file-identification.md)) and skip past the `0xFF` terminator.
2. **Deserialize** the remainder of the file with a CBOR parser to obtain the `RaeBinaryFile` header record (see [File Header](rhopoint-elements-hub-rae-file-format-file-header.md)).
3. **Verify** the integrity of the `Data` byte array (optional): compute the hash specified by `HashAlgorithm` over the `Data` bytes as stored and compare it against `Hash`.
4. **Decompress** the `Data` byte array (if `Compression` is not `"none"`).
5. **Deserialize** the decompressed data using a CBOR parser.
6. **Interpret** the result based on the `Format` value. For now, this is always an array of [MeasurementComponentMetaTuple](rhopoint-elements-hub-rae-file-format-measurementcomponentmetatuple.md) maps.