The structure of silver is well known, and has been for a long time. A Powder Diffraction File number (note that ICDD's PDF superceded the JCPDS many years ago) probably adds no value to the analysis in this case - with such a simple crystal system the peak positions and relative intensities are easily analyzed.
The primary purpose of the PDF is phase ID based on the diffraction pattern, which you don't need - you already know what the phase is. The "crystal system" is presumably FCC, which is fairly trivial to analyze, and does not require the PDF.
What additional information from the PDF entry are you looking for that isn't readily available in the literature for this material?