Short for Data Access Object, an object which is responsible for encapsulating data source access from the logic of a business object.
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Dao is actually a generic word used to denote any member of a family of single-edged, broad-bladed cutting or slicing tools, but in common, everyday usage means knife.
In China, dao is known as one of the four major weapons, along with the spear, saber, and the sword, and referred to as "The Courage of All Soldiers".
The Chinese spear and dao (liuyedao and yanmaodao) were commonly issued to infantry due to the expense of and relatively greater amount of training required for the effective use of Chinese straight sword, or jian.
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