in struts where can we find the property_name of <bean:write name="name" property="property_name" />

I am new to struts and i am viewing an example of struts project and it has a table in which it 开发者_JAVA百科has various number of data and to obtain that data from the data base it uses the code in the place of field to gain the data from database but i didn't see the name main_actvt_name which is the property anywhere.where can i find that in the action or in the form or in the jsp file.Guys help me out