主题：数据源名称是指什么？

Dim Book As New XLS.Book(ProjectPath & "Attachments\出库单.xls")
Dim fl As String = ProjectPath & "Reports\出库单.xls"
book.AddDataTable("出库","数据源名称","S*elect * from {出库} where 出库单编号= 'CK-20030726001'") '添加父表
book.AddDataTable("出库明细","数据源名称","S*elect * from {出库明细} where 出库单编号= 'CK-20030726001'") '添加子表
book.AddRelation("出库","出库单编号","出库明细","出库单编号") '建立关联
Book.Build() '生成细节区
Book.Save(fl) '保存工作簿
Dim Proc As New Process '打开工作簿
Proc.File = fl
Proc.Start()

实在搞不明白"数据源名称"是指哪个数据源？望老师指点。