validate `croissant.json` warning

[ihsaan-ullah]

I have a very simple json file and I am validating it using the mlcroissant package

mlcroissant validate --jsonld croissant.json

I get this warning about context:

WARNING: The JSON-LD `@context` is not standard. Refer to the official @context (e.g., from the example datasets in https://github.com/mlcommons/croissant/tree/main/datasets/1.0). The different keys are: {'dct', 'isLiveDataset', 'sc', 'dataType', 'conformsTo', 'transform', 'format', 'samplingRate', 'subField', 'md5', 'recordSet', 'citeAs', 'examples', 'fileObject', 'fileProperty', 'key', 'jsonPath', 'repeated', 'source', 'parentField', 'field', 'references', 'replace', 'column', 'cr', 'includes', 'fileSet', 'extract', 'separator', 'rai', 'data', 'path', 'regex'}

I know that I can ignore this warning but is there any documentation/recommendation about these fields and why they should be added to th @context?

[ecarrenolozano]

Hi @ihsaan-ullah, I am experiencing a similar situation. In my case the warning is:

ecarreno@mymachine (main) $ mlcroissant validate --jsonld metadata.json 
W1118 16:17:59.151616 128884353664832 rdf.py:87] WARNING: The JSON-LD `@context` is not standard. Refer to the official @context (e.g., from the example datasets in https://github.com/mlcommons/croissant/tree/main/datasets/1.0). The different keys are: {'samplingRate'}
W1118 16:17:59.164496 128884353664832 datasets.py:41] Found the following 1 warning(s) during the validation:
  -  [Metadata(mnist)] Property "https://schema.org/datePublished" is recommended, but does not exist.
I1118 16:17:59.164562 128884353664832 validate.py:53] Done.

And the metadata file is a copy of the MNIST metadata published here

The warning mentioned a field that I am not using called {'samplingRate'}. It means the validation process is not working as expected. How can help us?