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@xml-tools/simple-schema

v3.0.5

Published

XML Simple Schema

Downloads

2,436

Readme

npm (scoped)

@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.