abstract syntax
5.1(Abstract Syntax Notation One) and PKCS#7 (Cryptographic Message Syntax Standard ) syntax and extracting the signed data and signed certificates from the data in PKCS#7 form after CAPICOM signed, then verified the data integrity and the validity of the certificate, those have been realized under the Struts frames.
10.With the emphasis on the abstraCt syntax tree (AST), the paper also discusses the structure of a disk file as well as the functions designed for saving and recovering the AST.

