1.1 --- a/docs/concepts.txt	Fri May 01 02:38:05 2009 +0200
     1.2 +++ b/docs/concepts.txt	Tue May 05 20:25:51 2009 +0200
     1.3 @@ -220,6 +220,19 @@
     1.4  removed and the attrcode is not specified for classes: the presence of an
     1.5  attrcode indicates that a given object is an instance.
     1.6  
     1.7 +Attributes
     1.8 +----------
     1.9 +
    1.10 +For classes, modules and instances, the attributes in the structure correspond
    1.11 +to the attributes of each kind of object. For functions, however, the
    1.12 +attributes in the structure correspond to the default arguments for each
    1.13 +function, if any.
    1.14 +
    1.15 +The two kinds of structure attribute should be accommodated by both groups of
    1.16 +objects, since without a default argument section, classes and instances may
    1.17 +not employ default arguments in their respective instantiator/__init__ and
    1.18 +__call__ methods.
    1.19 +
    1.20  Structure Types
    1.21  ---------------
    1.22