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LHAPDF is the Les Houches Accord PDF Interface. It provides a unified and easy to use interface to modern PDF sets. This library can be included to analysis to study the structure of the nucleon.

Latest released version (23/10/2008): lhapdf-5.6.0.tar.gz. First download this gzipped tar file. Than follow instructions to install LHAPDF. I recommend during configure process use command

./configure --prefix=/cern/lhapdf

Than set environment variables (see file source_me.csh_example)

setenv  LHAPATH         /cern/lhapdf
setenv  PATH            ${PATH}:${LHAPATH}/bin
setenv  LHAPDFSETS      `lhapdf-config --pdfsets-path`

For more details use home page LHAPDF.