Building DSL in MPS example

Name		Name	Last commit message	Last commit date
Latest commit History 16 Commits
languages/alter		languages/alter
solutions/select.alter.sandbox		solutions/select.alter.sandbox
.gitattributes		.gitattributes
.gitignore		.gitignore
LICENSE		LICENSE
README.md		README.md
select.alter.mpr		select.alter.mpr

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