Attach or include a pdf that is stored as a BLOB in FND_LOBS table into the main BIP report

Have a BIP report , wish to include an external BLOB stored file (in this case it resides as a pdf format) into the main report.

The attachment can appear inline or as an attachment within the main report.

What I tried.

1. Using a db function extracted the BLOB and converted it into base64 into an .xml file

2. In the rtf template created the following element mapping

<fo:instream-foreign-object content-type="application/pdf">
<xsl:value-of select="/COE_PO_BLOB/LIST_G_BLOB/G_BLOB/FILE_DATA"/>
</fo:instream-foreign-object>

where FILE_DATA element stores the blob data in base64

However not able to accomplish the result.