Table 3.
Research subjects and search keywords

Activity field	Business type	No. of registered business types	No. of workers	Sales
Design and construction management	Urban planning landscape architectural services	Establishments	Workers	Sales
	Landscape engineering business	Technical areas	Engineers	Order performance
Construction and maintenance & management	Landscaping works	Registered business types	Engineers	Establishment erformance
	Landscape gardening works	Registered business types	Engineers	Establishment erformance
	Landscape architectural facilities setting works	Registered business types	Engineers	Establishment erformance
	Landscape care and maintenance service activities	Establishments	Workers	Sales