(1) information abstract: Also known as information abstract or information abstract, it is characterized by comprehensively and concisely summarizing the purpose, methods, main data and conclusions of the paper. Usually, this abstract can partially replace reading the full text.
(2) Indicative abstract: also often called descriptive abstract, descriptive abstract or thematic abstract. Generally, only two or three sentences are used to summarize the theme of the paper, which does not involve arguments and conclusions, and is mostly used for summary, meeting report, etc. This abstract can be used to help potential readers decide whether to read the full text or not.
(3) Informative-indicative summary: the part of the document with high information value is expressed in the form of reportable summary, and the rest is expressed in the form of indicative summary.