Visual specification of software is gaining popularity, but its usage is restricted by the lack of precise semantics of visual languages. In the present work, precise semantics of visual languages is defined. Three kinds of deep semantics of schemes are presented as different ways of usage of attribute models of schemes. Attribute models of a wide class of schemes are defined and higher-order attribute models are introduced. Dynamic evaluation of attributes is used in defining semantics of schemes.
IOS Press, Inc.
6751 Tepper Drive
Clifton, VA 20124
Tel.: +1 703 830 6300
Fax: +1 703 830 2300 firstname.lastname@example.org
(Corporate matters and books only) IOS Press c/o Accucoms US, Inc.
For North America Sales and Customer Service
West Point Commons
Lansdale PA 19446
Tel.: +1 866 855 8967
Fax: +1 215 660 5042 email@example.com