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Parsing with AMF

AMF can parse AML dialects and the following API specifications:

The following section explains the basics of parsing, and the example shows how to parse each specification in Java or JavaScript.

Parsing Basics#

Parsing is the process of analyzing a sequence of tokens and then building a data structure from them.

AMF uses SYAML to read a JSON or YAML file and generates an abstract syntax tree (AST) from the file, which is later used to generate a graph that represents the model. The model can be either a Web API model (representing an API, independent of its specification), or an AML document model (a dialect, vocabulary, or dialect instance).

Parsing returns a BaseUnit object, which is a graph of the model. Depending on the content in the parsed file, the BaseUnit object can be a Fragment, a Module, a Document or another type.

For more information about the AMF model, see the AMF model documentation resource.

The following figure shows the parsing process:

parsing graph

  • SYAML is used to generate an AST from a YAML/JSON file
  • AMF uses the AST to generate a graph of the model, called BaseUnit
    • This model will be used in the following stages of AMF (resolution, validation, emission)

Parsing code examples#

The file paths you give the parser must have the following structure:


  • Absolute path: file:///C:/testing/api.raml
  • Relative path: file://api.raml

MacOS and Unix:

  • Absolute path: file:///Users/aml/testing/api.raml
  • Relative path: file://api.raml

Also, before parsing an AML dialect instance, you must register the dialect using the AMF.registerDialect() function.

Code extracted from the examples GitHub repository.

Last updated on by arielmirra