Autodesk 235B1-05A761-1301 User Guide - Page 100

Part Sizes To understand how individual part sizes relate to the definition files of a part, it is important to understand how the part data is defined in the XML file. Part data stored in the XML definition file consists of 2 types of properties: common parameters and size parameters. Common parameters remain constant for all part sizes. They are defined once in a part family and are shared by all part sizes. If you change a common parameter, it is updated for all part sizes. Common parameters include domain, type, and subtype. The following examples show common parameters for a mechanical, electrical, and plumbing part size. ■ Mechanical: Common parameters for the 6 x 4 inch Rectangular Floor Register part size are as follows: duct component air terminal rectangular floor register ■ Electrical: Common parameters for the 13 Hole Large Outlet Box - 1 inch Conduit part size are as follows: conduit component junction box square outlet box ■ Plumbing: Common parameters for the 5 x 5 inch Rectangular Floor Drain part size are as follows: pipe component drain plumbing rectangular floor drain Size parameters include a set of parameter attributes such as name, description, and units; and parameter values such as size dimensions and material type. A size parameter can define one or more part sizes depending on how the size parameter is stored in the part family. Different storage methods enable multiple part sizes to be defined by various combinations of size parameters. Viewing part sizes in Catalog Editor and in the part size table of the Add dialog 82 | Chapter 4 Drawing Essentials