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Why do I need DSL analysis tools?

Could DSL be as simple as an API, and therefore does not need a parser? Or I don’t understand what a specific domain is? I thought this applies to any organized set of rules to solve a specific domain problem. The API seems to fit this definition, right?

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You can embed DSL in a more general programming language. This is often a good solution. (We can say that this DSL takes the form of a specific API.)

You can also create a separate language with your own interpreter to represent the concepts of your domain. This is usually a larger event, and often this is not necessary.

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You confuse the concept with implementation. A domain-specific language is any representation of an idea that is considered to be "close" to the subject area, and is not a common language for describing problem solving in general.

Yes, DSL can be implemented as an API that provides functions related to specific concepts in a problem area, but DSL is equally valid when presented as a text file.

Pragmatic programmer: Journeyman to Master provides a good description of DSL and the circumstances in which they are useful, with examples. Highly recommended.

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And, of course, graphical DSL does not require parsing at all.

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