When SIS draws items, it uses Named Object Library Classes, such as Pen, Brush, Filter, Symbol, etc.
By using Named Object Library Classes, each item does not need to remember, for example, a definition for its Pen. Instead, each item just remembers a Penname. This saves a lot of memory, especially when thousands of items all use the same pen.
The name can be from 1 to 255 characters, and it can include any characters except backslash, tab and escape. However, you should not use the following characters if you want to be able to distinguish the name from property names: "_ # & %".
The name can contain facets separated by a dot character. This lets SIS present many Named Object Library Classes in a tree structure.
Note: All names used in Named Object Library Classes are case insensitive.
If the first character of a name is an asterisk (*), then the object will be hidden from the User Interface. In addition the Toggle '*' Objects command lets you show or hide * objects from the Libraries Control Bar tree.
In addition to styling information, Named Object Library Classes can be other useful objects, e.g. Coordinate Reference System, Geodetic Datum, Filter, etc. The full list is as follows, class names are shown in brackets:
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