- Brackets (), quotation marks “”, etc. need to be used as half-width format; and they must be used in pairs.
- Logical keywords (Boolean terms): AND/OR/NOT need to have a space before and after. With successful input, the logical keywords (AND/OR/NOT) will be shown in black color, and the keywords will be shown in red color;
- Keywords in English can be set with or without capitalization, Keywords in Chinese can be set with both Traditional Chinese and Simplified Chinese;
- It is recommended to add double quotation marks (“”) in English format when “English phrases” or “mixed Chinese and English phrases” are used, in order to ensure the accuracy of automatic machine coding.
