Artificial Intelligence Based Metadata Semantic Enrichment

Mechanisms are provided for automatically generating semantical enhanced metadata for a structured data structure. Multi-task machine learning training is performed, based on data comprising separate sets of training data samples for each of a plurality of semantic metadata enhancement tasks, of a base artificial intelligence (AI) computer model to thereby generate a fine-tuned AI computer model trained to specifically generate semantically enhanced metadata for structured data structures. A prompt is received that specifies a structure of an input structured data structure and requests a semantic metadata enhancement task from the plurality of semantic metadata enhancement tasks. The fine-tuned AI computer model processes the prompt to generate semantically enhanced metadata for the structure of the input structured data structure and provide it to a downstream computing system for performing a downstream computing operation based on the semantically enhanced metadata.