What does DOEx mean?

Could you please elaborate on the term "DOEx"? It appears to be a specific entity or acronym within the cryptocurrency or finance industry, but I'm not entirely familiar with its meaning. Could you provide a concise definition, including any relevant context or significance it holds within the industry? Additionally, if it's a platform, service, or technology, could you explain its primary function or purpose? Understanding DOEx would greatly enhance my knowledge in this field.