The purpose of this workshop is to bring together scientists and students to share our knowledge and collaboratively discuss crucial issues related to the chemical abundances in gaseous nebulae. The workshop will cover all major theoretical and observational aspects of the study of chemical abundances in HII regions, Active Galactic Nuclei and Planetary Nebulae. For five days, extensive discussions about specific issues in several areas covered by the workshop will be provided. Also, implications of several recent surveys and telescopes to chemical abundance studies will be discussed.