Samples is used to match WAL records of type Samples.

Series is used to match WAL records of type Series.

Tombstones is used to match WAL records of type Tombstones.

Unknown is returned for unrecognised WAL record types.

ErrNotFound is returned if a looked up resource was not found.

Decoder decodes series, sample, and tombstone records.

Encoder encodes series, sample, and tombstones records.

RefSample is a timestamp/value pair associated with a reference to a series.

RefSeries is the series labels with the series ID.

Type represents the data type of a record.