sentences:  DDA undertakes construction, development and maintenance of commercial properties like retail shops in local markets, shopping complexes, office complexes, makeshift industrial set ups, hospitals, community halls, clubs, educational institutions, religious segregation centres etc.These properties are disposed through auctions or tenders.Delhi Development Authority (DDA) aims to provide an entire network of sports facilities through sports complexes, play fields, multi-facility gymnasiums and fitness centres, golf courses etc.