You can use the Read metadata from HCP step to identify and select an HCP object by its URL path and then select a specific target annotation name to read. The step returns the requested custom metadata from the annotation back to your PDI transformation for downstream processing. You can use the Write metadata to HCP step to further refine the metadata within the transformation and write it back to HCP.
Hitachi Content Platform (HCP) is an object-based storage repository designed for unstructured data. To add structure and control to the data, HCP creates metadata annotations that are associated with each object. An HCP object consists of a read-only file, a unique URL, system metadata properties, and custom metadata annotations. Each annotation for an HCP object has its own annotation name (for example: myannotation0515202).