Content analysis is mainly used to categorize and code the textual data. In content analysis, categorizing methods include:
1) Construct categories based on theories or past research results;
2) Construct categories by researchers themselves based on common sense, experience, and research purposes;
3) Reference categories from other researches: modify and localize other researchers’ categories with local practice, or some other specific standards.

The Categorization section is specifically for constructing categories.