我有一个这样创建的视图：

CREATE VIEW [dbo].[vwData] WITH SCHEMABINDING
AS
    SELECT  [DataField1] ,
            [DataField2] ,
            [DataField3]
    FROM    dbo.tblData

当我尝试在其上创建全文索引时，如下所示：

CREATE FULLTEXT INDEX ON [dbo].[vwData](
[DataField] LANGUAGE [English])
KEY INDEX [idx_DataField]ON ([ft_cat_Server], FILEGROUP [PRIMARY])
WITH (CHANGE_TRACKING = AUTO, STOPLIST = SYSTEM)

我收到此错误：

View 'dbo.vwData' is not an indexed view. 
Full-text index is not allowed to be created on it.

知道为什么吗？