APE-HE NeXus File to JSON Document Converter

Description:

This script is designed to automate the tasks of extracting metadata from NeXus (.nxs) files generated by the Advanced Photoelectric Effect - High Energy (APE-HE) experiment, and the mapping of extracted metadata to a predifined JSON schema to generate a structured JSON document. The NeXus file is parsed using the Python library H5py, which allows to efficiently navigate and manipulate HDF5-based files like NeXus. The current script is particularly processing a single Nexus file from APE-HE experiments, converting the extracted metadata into a structured JSON format ready for storage.

Inputs:

• Path to the Schema File (.json): A JSON schema that defines the desired structure of the output document.
• Path to the NeXus File (.nxs): A NeXus file containing experimental metadata and data.
• Name of the Output File (.json): The desired name of the output file where the metadata document will be saved.

Output:

A structured JSON file containing the extracted metadata aligned with the schema.

How to execute the script:

python NexusMapping_cmdline.py <path_to_schema.json> <path_to_NeXus_file.nxs> <output_document.json>