Attributes are enclosed in braces {} and can only be text. Attributes are text items which take on the form name=value. If it doesn’t have name=value, it’s not an attribute. Attributes are attached to the previous object. Here’s an example:
P 988 500 1300 500 1
{
T 1000 570 5 8 1 1 0
pinseq=3
T 1000 550 5 8 1 1 0
pinnumber=3
}
The object is a pin which has an attribute pinnumber=3 and pinseq=3 (name=value). You can have multiple text objects (both the T ... and text string are required) in between the braces {}. As of 20021103, you can only attached text items as attributes. Attaching other object types as attributes is unsupported.
You can also have “toplevel” attributes. These attributes are not attached to any object, but instead are just text objects that take on the form name=value.
These attributes are useful when you need to convey some info about a schematic page or symbol and need the netlister to have access to this info.