Query XML SSRS Report data for those Reports which have sub reports

I am trying to query the SSRS XML Catalog for those SSRS Reports which have subreports, and to list each of those subreports with their parent report - in the following format:

Parent Report SubReport

Parent Report SubReport2

etc.

This is my code so far, but I'm not certain where to put the filters and filter syntax on the XML Query portion:

Drop TABLE prmcustomreports.dbo.tblReportDefinition1


CREATE TABLE prmcustomreports.dbo.tblReportDefinition1
(
	[rowid] [int] IDENTITY(1,1) NOT NULL,
	Servername varchar(255) default @@ServerName,
	Ver varchar(max) default @@Version,
    report_name varchar (max),
    report_path varchar (max),
    Report_N2 varchar (max),
    DataSource varchar (max),
    ContentXML XML,
    LastUpdatedDate datetime DEFAULT (getdate()) ,
    Element varchar(max),
    Attribute varchar(max),
    Val varchar(max),

CONSTRAINT [tblPKReportDefinition1] PRIMARY KEY CLUSTERED
(
	[ROWid] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]


Drop TABLE prmcustomreports.dbo.tblReportDefinition2


CREATE TABLE prmcustomreports.dbo.tblReportDefinition2
(
	[rowid] [int] IDENTITY(1,1) NOT NULL,
	Servername varchar(255) default @@ServerName,
	Ver varchar(max) default @@Version,
    report_name varchar (max),
    report_path varchar (max),
    Report_N2 varchar (max),
    DataSource varchar (max),
    ContentXML XML,
    LastUpdatedDate datetime DEFAULT (getdate()) ,
    Element varchar(max),
    Attribute varchar(max),
    Val varchar(max),

CONSTRAINT [tblPKReportDefinition2] PRIMARY KEY CLUSTERED
(
	[ROWid] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]





Truncate table prmcustomreports.dbo.tblReportDefinition1
Truncate table prmcustomreports.dbo.tblReportDefinition2


Insert into prmcustomreports.dbo.tblReportDefinition1


(
    report_name ,
    report_path ,
    Report_N2 ,
    DataSource,
    ContentXML
)

SELECT
c.[Name],
c.[Path],
d.Name,
cd.path AS [Data Source],
CONVERT(varchar(max), CONVERT(varbinary(max), C.[Content])) Content
FROM [dbo].[Catalog] (nolock) c

LEFT JOIN dbo.DataSource (nolock) d
ON c.ItemID = d.ItemID

LEFT JOIN [dbo].[Catalog] (nolock) cd
ON d.link = cd.ItemID

WHERE (c.[Type]  = 2 OR c.[Type]  = 6 or c.[Type]  = 5)
AND LEN(c.Name) <> 0

ORDER BY c.[Name], c.[Path]

--Select * from #ReportDefinition




Insert into prmcustomreports.dbo.tblReportDefinition2


(
    report_name ,
    report_path ,
    Report_N2 ,
    DataSource,
    ContentXML,
    Element ,
    Attribute,
    Val
)



SELECT
	report_name ,
    report_path ,
    Report_N2 ,
    DataSource,
    ContentXML,

	x.y.value('local-name(..)', 'VARCHAR(MAX)') parentElementName,
	x.y.value('local-name(.)', 'VARCHAR(MAX)') as attribute,
    x.y.value('.', 'VARCHAR(MAX)') as val
FROM PRMCustomReports..tblReportDefinition1 rd
	CROSS APPLY rd.ContentXML.nodes('//*[text()], //@*') AS x(y)

John