Table 1.

Dimensions of the data extraction

Classification scheme	Attributes
Input	Single vs Multiple Documents Monolingual vs Multilingual Abstract vs Full Text Literature vs EHRs vs Others
Purpose	User-oriented vs Generic To facilitate clinical decision-making vs To facilitate biomedical research vs To facilitate patient health information seeking
Output	Extractive vs Abstractive Informative vs Indicative
Method	Statistics Machine Learning (ML) Computational Linguistics (CL) Hybrid
Evaluation	Intrinsic vs Extrinsic Quantitative vs Qualitative