The source journals and the extended versions of the journal are important components of the journal classification system used to identify and track high-quality journals in the fields of Web development and computer science. The source journal of the Chinese Academy of Sciences was developed and maintained by the Institute of Computer Technology of the Chinese Academy of Sciences. The source journals of the CSSSCI were journals recognized under the CSSSCI classification standards. The papers of these journals were widely used in computer science and Web development research and development. The extended edition was a sub-set of the source journals of the CSSSCI, including all the journals recognized by the CSSSCI classification standards and some important sub-journals of the CSSSCI source journals. The main difference between the extended edition and the source journal was the scope and number of journals included. Therefore, the source journals and extended versions of the CSSSCI were important reference resources that could help researchers understand the latest developments in computer science and Web development, as well as the quality and credibility of the papers published in these journals.