There are two different archives included in this directory: 1.) parse_blast_xml.tar.gz is an example program to parse BLAST XML output using Expat. The expat libraries are required for this. README.parse_blast_xml is the README for this archive and is included in the archive. 2.) blast_demo.tar.gz is an archive containing some example programs to call the BLAST libraries (inside the NCBI toolkit). The NCBI toolkit is required for this. README.blast_demo is a README file that accompanies this archive and is included in the archive.