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Diffstat (limited to 'sci-physics/hepmc/metadata.xml')
| -rw-r--r-- | sci-physics/hepmc/metadata.xml | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/sci-physics/hepmc/metadata.xml b/sci-physics/hepmc/metadata.xml new file mode 100644 index 000000000000..5733312e2b08 --- /dev/null +++ b/sci-physics/hepmc/metadata.xml @@ -0,0 +1,25 @@ +<?xml version="1.0" encoding="UTF-8"?> +<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd"> +<pkgmetadata> +<herd>sci-physics</herd> +<longdescription lang="en"> + The HepMC package is an object oriented event record written in C++ + for High Energy Physics Monte Carlo Generators. Many extensions from + HEPEVT, the Fortran HEP standard, are supported: the number of entries + is unlimited, spin density matrices can be stored with each vertex, + flow patterns (such as color) can be stored and traced, integers + representing random number generator states can be stored, and an + arbitrary number of event weights can be included. Particles and + vertices are kept separate in a graph structure, physically similar to + a physics event. The added information supports the modularisation of + event generators. The package has been kept as simple as possible with + minimal internal/external dependencies. Event information is accessed + by means of iterators supplied with the package. + + Reference: M. Dobbs and J.B. Hansen, Comput. Phys. Commun. 134 (2001)41. +</longdescription> +<use> + <flag name='gev'>Build with GeV instead of default MeV for momentum units</flag> + <flag name='cm'>Build with cm instead of default mm for length units</flag> +</use> +</pkgmetadata> |