An alloy is a mixture of metals or a mixture of a metal and another element.Alloys are defined by metallic bonding character.An alloy may be a solid solution of metal elements (a single phase) or a mixture of metallic phases (two or more solutions). Intermetallic compounds are alloys with a defined stoichiometry and crystal structure.he term alloy is used to describe a mixture of atoms in which the primary constituent is a metal. The primary metal is called the base, the matrix, or the solvent. The secondary constituents are often called solutes.
Marl or marlstone is a calcium carbonate or lime-rich mud or mudstone which contains variable amounts of clays and silt.
Marpa is a library written in C, with a Perl wrapper. It is dedicated to parsing. That is, people who wish to write parsers incorporate Marpa into their programs. You start using Marpa by providing it with 2 inputs, a grammar and an input stream which may or may not conform to the given grammar.This means Marpa parses the grammar and stores it in RAM in some convenient form.t is dedicated to parsing. That is, people who wish to write parsers incorporate Marpa into their programs. You start using Marpa by providing it with 2 inputs, a grammar and an input stream which may or may not conform to the given grammar.