A graphic object can have default values for
its properties, which can be set at creation time.
In a style sheet, some property values may be inherited at all
levels and therefore come from the graphic object’s default values.
If you change such a property value in a style rule to reflect a
temporary state (such as selection), when the temporary state no
longer applies (the object is deselected), the property value does
not automatically revert to the default value. This situation
arises because there is no style rule to set the default value. You
therefore need to include this setting explicitly in the general
rule for the node or link. For an example, see Resetting a default value after a state
change.
If you do not change such a property value
according to a temporary state in a style rule, you can leave the
implicit default value and not worry about it.