Cooperative Development depends on a versioned source code repository like git. Github and its clones provide cheap or free storage to open source projects. The more dynamic the development activity the more likely work will be distributed as source.
> […] There is even a good chance that the input file will permit Annotation of these items, **indicating the Sources they were taken from**. If we are really lucky, the formal language of the input file is documented and designed to permit the extraction of information for other uses.
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source | BrE sɔːs, AmE sɔrs | noun Quelle (Fem.) ▸ source of income Einkommensquelle (Fem.) ▸ source of infection Infektionsherd (Mask.) ▸ the source of all woes die Wurzel allen Übels ▸ locate the source of a leak (literal or figurative) feststellen, wo eine undichte Stelle ist ▸ the whole thing is a source of some embarrassment to us das Ganze ist für uns ziemlich unangenehm ▸ at source an der Quelle ▸ tax deducted at source Quellensteuer (Fem.) ▸ my wages are taxed at source die Steuer wird direkt von meinem Lohn abgezogen