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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+ <herd>sci-chemistry</herd>
+ <maintainer>
+ <email>jlec@gentoo.org</email>
+ </maintainer>
+ <longdescription>
+A fortran program in which Tirion's model (also called the Elastic Network
+Model) is implemented. Within the frame of this model, atoms (particles)
+less than cutoff (angstroms) away from each others are linked by springs of
+same strength. Alternatively, a list of interacting atoms can be given to the
+program.
+Requirements: a file with the coordinates of the system, in PDB (Protein Data
+Bank) or "x y z mass" format.
+
+Output: the hessian (the mass-weighted second derivatives of energy matrix),
+in the "i j non-zero-ij-matrix-element" format.
+
+Diagstd, a fortran program with a standard diagonalization routine, can next
+be used in order to obtain the corresponding normal modes of the system. If
+the system is large, the RTB approximation can prove usefull (see below).
+</longdescription>
+</pkgmetadata>