站长：
你好，能否同我讲解一下JIVE中的几个表的字段作用

CREATE TABLE jiveGroup (
groupID INT NOT NULL,
name VARCHAR(100) NOT NULL,
description VARCHAR(255) NULL,
modifiedDate CHAR(15) NOT NULL,
creationDate CHAR(15) NOT NULL,
);



CREATE TABLE jiveGroupPerm (
forumID INT NOT NULL,
groupID INT NOT NULL,
permission INT NOT NULL,);



CREATE TABLE jiveGroupProp (
groupID INT NOT NULL,
name VARCHAR(100) NOT NULL,
propValue TEXT NOT NULL,

);


CREATE TABLE jiveGroupUser (
groupID INT NOT NULL,
userID INT NOT NULL,
administrator INT NOT NULL,
);