Ingestion Rules

Everything is centered around measurement data (subset and following)

The ingestion and consequently also the download are centered around the actual measurement data. The subset entity always serves as the entry point for data requests. It is possible to import only metadata into the system. However, a consistent download of all data only works with the data itself, which is always necessarily located at the subset.

Two scenarios must be considered in particular

1) Ingestion of metadata without actual data

When metadata is read into the system without using existing metadata and the metadata does not contain any actual measurement data, it can be read out again at ingest level. For example: In ingest with the id 7 samples were read in that were not filled with subsets. But no samples, stations or cruises already in the system were used, all metadata and data can be downladed via ingest id 7.

2) Use of existing metadata

This data can only be read out of the system again if the metadata has been provided with actual data. In particular, if metadata without extension with actual data has been reused, it is not possible to read this data again at the ingestion id level. For example: If a sample from ingest with 7 is used again in ingest 10 and was not extended (with a subset at least), it cannot be retrieved via ingest id 10.