libxmljs2-xsd

XSD 1.0 validation for node.js 14.x and 16.x using libxml via libxmljs2
As of now, XSD 1.1 is not supported, and the author does not actively work on it. Feel free to submit a PR if you want to.

Installation

npm install libxmljs2-xsd

On windows there are several prerequisites that need to be met before an install will work. Windows-Build-Tools is a great helper module for this task.

npm install --global --production windows-build-tools
npm install libxmljs2-xsd

Basic usage

var xsd = require('libxmljs2-xsd');
  // throws in case of error
  var schema = xsd.parseFile(schemaPath);
  // throws in case of technical error, returns a list of validation errors, 
  //   or null if the document is valid
  var validationErrors = schema.validate(documentString);
});

libxmljs2 integration

libxmljs2-xsd depends on libxmljs2 that bundles libxml.

The libxmljs2 module required by node-libxml-xsd is exposed as require('libxmljs2-xsd').libxmljs. This prevents depending on libxmljs2 twice which is not optimal and source of weird bugs.

It is possible to work with libxmljs2 documents instead of strings as inputs to the parse() and validate() functions.

Imports and includes

XSD includes are supported but relative paths must be given from the execution directory, usually the root of the project.

Includes are resolved when parsing the schema. Therefore the parsing task becomes IO bound, which is why you should not use synchronous parsing when you expect some includes.

Environment compatibility

For now 64bits linux and 32bits windows are confirmed. Other environments are probably ok, but not checked. Please report an issue if you encounter some difficulties.

node-libxml-xsd depends on node-gyp, you will need to meet its requirements. This can be a bit painful mostly for windows users. The node-gyp version bundled in your npm will have to be greater than 0.13.0, so you might have to follow these instructions to upgrade. There is no system dependancy otherwise as libxml is bundled by libxmljs2.

API Reference

libxml-xsd

Node.js bindings for XSD validation from libxml

libxml-xsd
- static
  - .libxmljs
  - .parse(source, options) ⇒
  - .parseFile(sourcePath, options) ⇒
- inner
  - ~Schema

libxml-xsd.libxmljs

The libxmljs module. Prevents the need for a user's code to require it a second time. Also prevent weird bugs.

Kind: static property of libxml-xsd

libxml-xsd.parse(source, options) ⇒

Parse a XSD schema

Kind: static method of libxml-xsd
Returns: The parsed Schema

Param	Type	Description
source	`string` \| `Document`	The content of the schema as a string or a libxmljs document
options	`object`	The parsing options

libxml-xsd.parseFile(sourcePath, options) ⇒

Parse a XSD schema

Kind: static method of libxml-xsd
Returns: The parsed Schema

Param	Type	Description
sourcePath	`stringPath`	The path of the file
options	`object`	The parsing options

libxml-xsd~Schema

Kind: inner class of libxml-xsd

~Schema

new Schema(schemaDoc, schemaObj)

A compiled schema. Do not call this constructor, instead use parse or parseFile.

store both the source document and the parsed schema if we don't store the schema doc it will be deleted by garbage collector and it will result in segfaults.

Param	Type	Description
schemaDoc	`Document`	XML document source of the schema
schemaObj	`Document`	Simple wrapper of a XSD schema

schema.validate(source) ⇒

Validate a XML document over a schema

Kind: instance method of Schema
Returns: An array of validation errors, or null if document is valid

Param	Type	Description
source	`string` \| `Document`	The XML content to validate with the schema, to be given as a string or a libxmljs document

schema.validateFile(sourcePath) ⇒

Apply a schema to a XML file