How to convert XML String to DataTable in Sql Server

DECLARE @CategoryLevel varchar(max)

SET @CategoryLevel = '<DocumentElement>

  <CategoryLevel>

    <Mapping_ID>0</Mapping_ID>

    <Level_ID>1</Level_ID>

    <Level_Description>LEVEL1</Level_Description>

    <Level_Score>10</Level_Score>

    <IsChecked>true</IsChecked>

  </CategoryLevel>

  <CategoryLevel>

    <Mapping_ID>0</Mapping_ID>

    <Level_ID>2</Level_ID>

    <Level_Description>LEVEL2</Level_Description>

    <Level_Score>30</Level_Score>

    <IsChecked>true</IsChecked>

  </CategoryLevel>

</DocumentElement>'

 DECLARE @handle INT 

DECLARE @PrepareXmlStatus INT 

EXEC @PrepareXmlStatus= sp_xml_preparedocument @handle OUTPUT, @CategoryLevel 

DECLARE @TblLevel as table(Mapping_ID BIGINT,

    Level_ID BIGINT,

    Level_Description NVARCHAR(256),

    Level_Score INT,

    IsChecked BIT)

INSERT INTO @TblLevel

SELECT  *

FROM    OPENXML(@handle, '/DocumentElement/CategoryLevel', 2) 

    WITH (

    Mapping_ID BIGINT,

    Level_ID BIGINT,

    Level_Description NVARCHAR(256),

    Level_Score INT,

    IsChecked BIT

    ) 

EXEC sp_xml_removedocument @handle

SELECT * FROM @TblLevel