simple-schema

@xml-tools/simple-schema

This package includes three elements:

• Data structure definition for a basic XML schema represented as a JavaScript object literal.
• Validation logic to inspect a given XML conforms to a Schema.
• Content Assist logic that provides suggestions using the Schema information.

Installation

With npm:

• npm install @xml-tools/simple-schema

With Yarn

• yarn add @xml-tools/simple-schema

Usage

Please see the TypeScript Definitions for full API details.

• Defining a Schema:

  const schema = {
    name: "people",
    required: true,
    cardinality: "single",
    attributes: {},
    elements: {
      person: {
        name: "person",
        required: false,
        cardinality: "many",
        attributes: {
          eyeColor: {
            key: "eyeColor",
            required: false,
            value: ["grey", "blue", "green", "red"],
          },
        },
        elements: {
          name: {
            cardinality: "single",
            required: true,
            name: "name",
            attributes: {},
            elements: {},
          },
        },
      },
    },
  };

• A Simple XML Text

  // A Sample XML Text
  const xmlText = `<people>
                         <person eyeColor="violet">
                           <name>Daenerys Targaryen</name>
                         </person>
                      </people>`;

• Performing Validations

  const { parse } = require("@xml-tools/parser");
  const { buildAst } = require("@xml-tools/ast");
  const { validate } = require("@xml-tools/validation");
  const { getSchemaValidators } = require("@xml-tools/simple-schema");
  
  const { cst, tokenVector } = parse(xmlText);
  const xmlDoc = buildAst(cst, tokenVector);
  const schemaValidators = getSchemaValidators(schema);
  const issues = validate({
    doc: xmlDoc,
    validators: {
      attribute: [schemaValidators.attribute],
      element: [schemaValidators.element],
    },
  });
  
  console.log(issues[0].msg); // Expecting one of <grey,blue,green,red> but found <violet>
  console.log(issues[0].position); // { startOffset: 46, endOffset: 53 }

• Using Content Assist APIs

  const { getSuggestions } = require("@xml-tools/content-assist");
  const { getSchemaSuggestionsProviders } = require("@xml-tools/simple-schema");
  
  const schemaSuggestionsProviders = getSchemaSuggestionsProviders(schema);
  
  const suggestions = getSuggestions({
    text: xmlText,
    offset: 47, // within the eyeColor quoted value
    providers: {
      attributeValue: [
        schemaSuggestionsProviders.schemaAttributeValueCompletion,
      ],
      attributeName: [schemaSuggestionsProviders.schemaAttributeNameCompletion],
      elementName: [schemaSuggestionsProviders.schemaElementNameCompletion],
    },
  });
  
  console.log(suggestions[0]); // { text: 'grey', label: 'grey' }
  console.log(suggestions[1]); // { text: 'blue', label: 'blue' }

Support

Please open issues on github.

Contributing

See CONTRIBUTING.md.