GB_Profile::
Book_ID: ID of a book(i.e. CIS310)
Title: title of a booking
Abstract: abstract of the book
Book_Url: URL of the book
Book_Password: password of a book
Base_Dir: the local directory of the book for caching
Vsersion_Set: all the exist version_set of the book
Book_profile::
Book_ID: ID of the book
Version_Set: version_set No. of the book
Base_dir: the local directory of the version_set of the book
Chapter_profile::
Book_ID:
Version_Set:
Chapter_No:
Version:
Chpater_Title:
Author_Affiliation:
Author:
Chapter_URL:
Chapter_Password
Teacher:
Student:
Who_is_Who:
Center_of_Excellence:
Tool:
Awareness:
File_Dictionary::
Book_ID:
Version_Set:
Chapter_No:
Version:
File_URL: url of the file
File_ID: an ID assigned to the file
Link_Dictionary::
File_ID_source: the file ID of the source of a link
File_ID_destination: the file ID of the destination of a link