diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..eb7c63a
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,150 @@
+# Based on https://github.com/github/gitignore/tree/master/Global
+
+################################################################################
+#
+# Ignore all dot-files and dot-folders, except .htaccess and .gitignore
+#
+################################################################################
+.*
+!/.gitignore
+!/.htaccess
+
+################################################################################
+#
+# JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion
+#
+################################################################################
+*.iml
+.idea/
+
+## File-based project format:
+*.ipr
+*.iws
+
+# Plugin-specific files:
+
+# IntelliJ
+/out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+
+################################################################################
+#
+# Netbeans
+#
+################################################################################
+
+nbproject/
+build/
+nbbuild/
+dist/
+nbdist/
+nbactions.xml
+nb-configuration.xml
+.nb-gradle/
+
+################################################################################
+#
+# Windows OS
+#
+################################################################################
+
+# Windows image file caches
+Thumbs.db
+ehthumbs.db
+
+# Folder config file
+Desktop.ini
+
+# Recycle Bin used on file shares
+$RECYCLE.BIN/
+
+# Windows Installer files
+*.cab
+*.msi
+*.msm
+*.msp
+
+# Windows shortcuts
+*.lnk
+
+################################################################################
+#
+# Notepad++
+#
+################################################################################
+
+*.bak
+
+################################################################################
+#
+# Vagrant
+#
+################################################################################
+
+.vagrant/
+
+################################################################################
+#
+# TortoiseGit
+#
+################################################################################
+
+# Project-level settings
+/.tgitconfig
+
+################################################################################
+#
+# NodeJS
+#
+################################################################################
+
+# Logs
+logs
+*.log
+
+# Runtime data
+pids
+*.pid
+*.seed
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (http://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directory
+# https://docs.npmjs.com/misc/faq#should-i-check-my-node-modules-folder-into-git
+node_modules
+
+################################################################################
+#
+# Composer
+#
+################################################################################
+
+composer.phar
+vendor/
+
+# Commit your application's lock file http://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file
+# You may choose to ignore a library lock file http://getcomposer.org/doc/02-libraries.md#lock-file
+#composer.lock
diff --git a/README.md b/README.md
index 85e03ad..a4cb69f 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,52 @@
-# dicms-xsd-validator
-Validate your XML easily to a XSD schema
+# XML Validator
+
+Validate your XML easily. The main purpose is to validate the XML to a XSD schema, but (basic) validation without a 
+schema is possible too.
+
+```php
+$validator = new Validator('books.xml');
+
+// Validate with a XSD schema
+$valid = $validator->validate('books.xsd');
+
+// Or validate without a XSD schema
+$valid = $validator->validate();
+```
+
+## Requirements
+
+This package requires PHP 7.1 or higher with the libxml extension (which is enabled by default).
+
+## Installation
+
+```php
+composer require vdhicts/xml-validator
+```
+
+## Tests
+
+Full code coverage unit tests are available in the `tests` folder. Run via phpunit:
+
+`vendor\bin\phpunit`
+
+By default a coverage report will be generated in the `build/coverage` folder.
+
+## Contribution
+
+Any contribution is welcome, but it should be fully tested, meet the PSR-2 standard and please create one pull request 
+per feature. In exchange you will be credited as contributor on this page.
+
+## Security
+
+If you discover any security related issues in this or other packages of Vdhicts, please email info@vdhicts.nl instead
+of using the issue tracker.
+
+## License
+
+This package is open-sourced software licensed under the [MIT license](http://opensource.org/licenses/MIT)
+
+## About vdhicts
+
+[Van der Heiden ICT services](https://www.vdhicts.nl) is the name of my personal company for which I work as 
+freelancer. Van der Heiden ICT services develops and implements IT solutions for businesses and educational 
+institutions.
diff --git a/composer.json b/composer.json
new file mode 100644
index 0000000..eac04ff
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,29 @@
+{
+    "name": "vdhicts/xml-validator",
+    "description": "Validate your XML easily to a XSD schema",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Dick van der Heiden",
+            "email": "info@vdhicts.nl",
+            "homepage": "http://www.vdhicts.nl",
+            "role": "Developer"
+        }
+    ],
+    "require": {
+        "php": "^7.1",
+        "ext-libxml": "*"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^7.0"
+    },
+    "autoload": {
+        "psr-4": {
+            "Vdhicts\\Dicms\\XmlValidator\\": "src/",
+            "Vdhicts\\Dicms\\XmlValidator\\Tests\\": "tests/"
+        }
+    },
+    "config": {
+        "sort-packages": true
+    }
+}
diff --git a/composer.lock b/composer.lock
new file mode 100644
index 0000000..0b69b0a
--- /dev/null
+++ b/composer.lock
@@ -0,0 +1,1426 @@
+{
+    "_readme": [
+        "This file locks the dependencies of your project to a known state",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
+        "This file is @generated automatically"
+    ],
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+                    "email": "ocramius@gmail.com",
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+                "copy",
+                "duplicate",
+                "object",
+                "object graph"
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+            "time": "2018-06-11T23:09:50+00:00"
+        },
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+            "name": "phar-io/manifest",
+            "version": "1.0.1",
+            "source": {
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+                "url": "https://github.com/phar-io/manifest.git",
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+            "require": {
+                "ext-dom": "*",
+                "ext-phar": "*",
+                "phar-io/version": "^1.0.1",
+                "php": "^5.6 || ^7.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
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+            "autoload": {
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+                    "role": "Developer"
+                },
+                {
+                    "name": "Sebastian Heuer",
+                    "email": "sebastian@phpeople.de",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "Component for reading phar.io manifest information from a PHP Archive (PHAR)",
+            "time": "2017-03-05T18:14:27+00:00"
+        },
+        {
+            "name": "phar-io/version",
+            "version": "1.0.1",
+            "source": {
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+                "url": "https://github.com/phar-io/version.git",
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+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phar-io/version/zipball/a70c0ced4be299a63d32fa96d9281d03e94041df",
+                "reference": "a70c0ced4be299a63d32fa96d9281d03e94041df",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^5.6 || ^7.0"
+            },
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+            "autoload": {
+                "classmap": [
+                    "src/"
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+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Arne Blankerts",
+                    "email": "arne@blankerts.de",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Sebastian Heuer",
+                    "email": "sebastian@phpeople.de",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "Library for handling version information and constraints",
+            "time": "2017-03-05T17:38:23+00:00"
+        },
+        {
+            "name": "phpdocumentor/reflection-common",
+            "version": "1.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phpDocumentor/ReflectionCommon.git",
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+            },
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+                "phpunit/phpunit": "^4.6"
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+            "extra": {
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+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "phpDocumentor\\Reflection\\": [
+                        "src"
+                    ]
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Jaap van Otterdijk",
+                    "email": "opensource@ijaap.nl"
+                }
+            ],
+            "description": "Common reflection classes used by phpdocumentor to reflect the code structure",
+            "homepage": "http://www.phpdoc.org",
+            "keywords": [
+                "FQSEN",
+                "phpDocumentor",
+                "phpdoc",
+                "reflection",
+                "static analysis"
+            ],
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+        },
+        {
+            "name": "phpdocumentor/reflection-docblock",
+            "version": "4.3.0",
+            "source": {
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+                "url": "https://github.com/phpDocumentor/ReflectionDocBlock.git",
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+            },
+            "dist": {
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+                "url": "https://api.github.com/repos/phpDocumentor/ReflectionDocBlock/zipball/94fd0001232e47129dd3504189fa1c7225010d08",
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+                "phpdocumentor/reflection-common": "^1.0.0",
+                "phpdocumentor/type-resolver": "^0.4.0",
+                "webmozart/assert": "^1.0"
+            },
+            "require-dev": {
+                "doctrine/instantiator": "~1.0.5",
+                "mockery/mockery": "^1.0",
+                "phpunit/phpunit": "^6.4"
+            },
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+            "extra": {
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+            "autoload": {
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+                    ]
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Mike van Riel",
+                    "email": "me@mikevanriel.com"
+                }
+            ],
+            "description": "With this component, a library can provide support for annotations via DocBlocks or otherwise retrieve information that is embedded in a DocBlock.",
+            "time": "2017-11-30T07:14:17+00:00"
+        },
+        {
+            "name": "phpdocumentor/type-resolver",
+            "version": "0.4.0",
+            "source": {
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+                "url": "https://github.com/phpDocumentor/TypeResolver.git",
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+            },
+            "require": {
+                "php": "^5.5 || ^7.0",
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+            "require-dev": {
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+            "type": "library",
+            "extra": {
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+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "phpDocumentor\\Reflection\\": [
+                        "src/"
+                    ]
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
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+                    "name": "Mike van Riel",
+                    "email": "me@mikevanriel.com"
+                }
+            ],
+            "time": "2017-07-14T14:27:02+00:00"
+        },
+        {
+            "name": "phpspec/prophecy",
+            "version": "1.7.6",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phpspec/prophecy.git",
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+            },
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+                "sebastian/comparator": "^1.1|^2.0|^3.0",
+                "sebastian/recursion-context": "^1.0|^2.0|^3.0"
+            },
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+                "phpunit/phpunit": "^4.8.35 || ^5.7 || ^6.5"
+            },
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+            "extra": {
+                "branch-alias": {
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+                }
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+            "autoload": {
+                "psr-0": {
+                    "Prophecy\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Konstantin Kudryashov",
+                    "email": "ever.zet@gmail.com",
+                    "homepage": "http://everzet.com"
+                },
+                {
+                    "name": "Marcello Duarte",
+                    "email": "marcello.duarte@gmail.com"
+                }
+            ],
+            "description": "Highly opinionated mocking framework for PHP 5.3+",
+            "homepage": "https://github.com/phpspec/prophecy",
+            "keywords": [
+                "Double",
+                "Dummy",
+                "fake",
+                "mock",
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+                "stub"
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+            "require-dev": {
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+            "license": [
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+                "url": "https://api.github.com/repos/sebastianbergmann/object-reflector/zipball/773f97c67f28de00d397be301821b06708fca0be",
+                "reference": "773f97c67f28de00d397be301821b06708fca0be",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^6.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.1-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                }
+            ],
+            "description": "Allows reflection of object attributes, including inherited and non-public ones",
+            "homepage": "https://github.com/sebastianbergmann/object-reflector/",
+            "time": "2017-03-29T09:07:27+00:00"
+        },
+        {
+            "name": "sebastian/recursion-context",
+            "version": "3.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/recursion-context.git",
+                "reference": "5b0cd723502bac3b006cbf3dbf7a1e3fcefe4fa8"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/recursion-context/zipball/5b0cd723502bac3b006cbf3dbf7a1e3fcefe4fa8",
+                "reference": "5b0cd723502bac3b006cbf3dbf7a1e3fcefe4fa8",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^6.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.0.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Jeff Welch",
+                    "email": "whatthejeff@gmail.com"
+                },
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                },
+                {
+                    "name": "Adam Harvey",
+                    "email": "aharvey@php.net"
+                }
+            ],
+            "description": "Provides functionality to recursively process PHP variables",
+            "homepage": "http://www.github.com/sebastianbergmann/recursion-context",
+            "time": "2017-03-03T06:23:57+00:00"
+        },
+        {
+            "name": "sebastian/resource-operations",
+            "version": "1.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/resource-operations.git",
+                "reference": "ce990bb21759f94aeafd30209e8cfcdfa8bc3f52"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/resource-operations/zipball/ce990bb21759f94aeafd30209e8cfcdfa8bc3f52",
+                "reference": "ce990bb21759f94aeafd30209e8cfcdfa8bc3f52",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.6.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                }
+            ],
+            "description": "Provides a list of PHP built-in functions that operate on resources",
+            "homepage": "https://www.github.com/sebastianbergmann/resource-operations",
+            "time": "2015-07-28T20:34:47+00:00"
+        },
+        {
+            "name": "sebastian/version",
+            "version": "2.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/version.git",
+                "reference": "99732be0ddb3361e16ad77b68ba41efc8e979019"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/version/zipball/99732be0ddb3361e16ad77b68ba41efc8e979019",
+                "reference": "99732be0ddb3361e16ad77b68ba41efc8e979019",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.6"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.0.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "Library that helps with managing the version number of Git-hosted PHP projects",
+            "homepage": "https://github.com/sebastianbergmann/version",
+            "time": "2016-10-03T07:35:21+00:00"
+        },
+        {
+            "name": "theseer/tokenizer",
+            "version": "1.1.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/theseer/tokenizer.git",
+                "reference": "cb2f008f3f05af2893a87208fe6a6c4985483f8b"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/theseer/tokenizer/zipball/cb2f008f3f05af2893a87208fe6a6c4985483f8b",
+                "reference": "cb2f008f3f05af2893a87208fe6a6c4985483f8b",
+                "shasum": ""
+            },
+            "require": {
+                "ext-dom": "*",
+                "ext-tokenizer": "*",
+                "ext-xmlwriter": "*",
+                "php": "^7.0"
+            },
+            "type": "library",
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Arne Blankerts",
+                    "email": "arne@blankerts.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "A small library for converting tokenized PHP source code into XML and potentially other formats",
+            "time": "2017-04-07T12:08:54+00:00"
+        },
+        {
+            "name": "webmozart/assert",
+            "version": "1.3.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/webmozart/assert.git",
+                "reference": "0df1908962e7a3071564e857d86874dad1ef204a"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/webmozart/assert/zipball/0df1908962e7a3071564e857d86874dad1ef204a",
+                "reference": "0df1908962e7a3071564e857d86874dad1ef204a",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^5.3.3 || ^7.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.6",
+                "sebastian/version": "^1.0.1"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.3-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Webmozart\\Assert\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Bernhard Schussek",
+                    "email": "bschussek@gmail.com"
+                }
+            ],
+            "description": "Assertions to validate method input/output with nice error messages.",
+            "keywords": [
+                "assert",
+                "check",
+                "validate"
+            ],
+            "time": "2018-01-29T19:49:41+00:00"
+        }
+    ],
+    "aliases": [],
+    "minimum-stability": "stable",
+    "stability-flags": [],
+    "prefer-stable": false,
+    "prefer-lowest": false,
+    "platform": {
+        "php": "^7.1",
+        "ext-libxml": "*"
+    },
+    "platform-dev": []
+}
diff --git a/phpunit.xml b/phpunit.xml
new file mode 100644
index 0000000..e46546b
--- /dev/null
+++ b/phpunit.xml
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<phpunit bootstrap="vendor/autoload.php"
+         backupGlobals="false"
+         backupStaticAttributes="false"
+         colors="true"
+         verbose="true"
+         convertErrorsToExceptions="true"
+         convertNoticesToExceptions="true"
+         convertWarningsToExceptions="true"
+         processIsolation="false"
+         stopOnFailure="false">
+    <testsuites>
+        <testsuite name="Unit Tests">
+            <directory>tests/unit</directory>
+        </testsuite>
+    </testsuites>
+    <filter>
+        <whitelist>
+            <directory suffix=".php">src/</directory>
+        </whitelist>
+    </filter>
+    <logging>
+        <log type="coverage-html" target="build/coverage"/>
+    </logging>
+</phpunit>
\ No newline at end of file
diff --git a/src/Exceptions/XmlValidatorException.php b/src/Exceptions/XmlValidatorException.php
new file mode 100644
index 0000000..81ace9b
--- /dev/null
+++ b/src/Exceptions/XmlValidatorException.php
@@ -0,0 +1,32 @@
+<?php
+
+namespace Vdhicts\Dicms\XmlValidator\Exceptions;
+
+use Exception;
+
+class XmlValidatorException extends Exception
+{
+    /**
+     * Returns an exception when the file is missing.
+     * @param string $file
+     * @return XmlValidatorException
+     */
+    public static function fileMissing(string $file): XmlValidatorException
+    {
+        return new self(
+            sprintf('The provided file `%s` doesn\'t exists', $file)
+        );
+    }
+
+    /**
+     * Returns an exception when the file isn't readable.
+     * @param string $file
+     * @return XmlValidatorException
+     */
+    public static function fileNotReadable(string $file): XmlValidatorException
+    {
+        return new self(
+            sprintf('The provided file `%s` isn\'t readable', $file)
+        );
+    }
+}
diff --git a/src/Validator.php b/src/Validator.php
new file mode 100644
index 0000000..669427d
--- /dev/null
+++ b/src/Validator.php
@@ -0,0 +1,136 @@
+<?php
+
+namespace Vdhicts\Dicms\XmlValidator;
+
+use Vdhicts\Dicms\XmlValidator\Exceptions;
+use XMLReader;
+
+class Validator
+{
+    /**
+     * Holds the XML file location.
+     * @var string
+     */
+    private $xmlFileName;
+
+    /**
+     * Holds the XSD file location.
+     * @var string|null
+     */
+    private $xsdFileName = null;
+
+    /**
+     * Validator constructor.
+     * @param string $xmlFile
+     * @param string|null $xsdFile
+     * @throws Exceptions\XmlValidatorException
+     */
+    public function __construct(string $xmlFile, string $xsdFile = null)
+    {
+        $this->setXmlFileName($xmlFile);
+        $this->setXsdFileName($xsdFile);
+    }
+
+    /**
+     * Returns the XML file name.
+     * @return string
+     */
+    public function getXmlFileName(): string
+    {
+        return $this->xmlFileName;
+    }
+
+    /**
+     * Stores the XML file name.
+     * @param string $xmlFileName
+     * @throws Exceptions\XmlValidatorException
+     */
+    private function setXmlFileName(string $xmlFileName): void
+    {
+        if (! file_exists($xmlFileName)) {
+            throw Exceptions\XmlValidatorException::fileMissing($xmlFileName);
+        }
+
+        if (! is_readable($xmlFileName)) {
+            throw Exceptions\XmlValidatorException::fileNotReadable($xmlFileName);
+        }
+
+        $this->xmlFileName = $xmlFileName;
+    }
+
+    /**
+     * Returns the XSD file name.
+     * @return null|string
+     */
+    public function getXsdFileName(): ?string
+    {
+        return $this->xsdFileName;
+    }
+
+    /**
+     * Stores the XSD file name.
+     * @param string|null $xsdFileName
+     * @throws Exceptions\XmlValidatorException
+     */
+    private function setXsdFileName(string $xsdFileName = null): void
+    {
+        if (is_null($xsdFileName)) {
+            $this->xsdFileName = null;
+            return;
+        }
+
+        if (! file_exists($xsdFileName)) {
+            throw Exceptions\XmlValidatorException::fileMissing($xsdFileName);
+        }
+
+        if (! is_readable($xsdFileName)) {
+            throw Exceptions\XmlValidatorException::fileNotReadable($xsdFileName);
+        }
+
+        $this->xsdFileName = $xsdFileName;
+    }
+
+    /**
+     * Validates the XML file.
+     * @return bool
+     */
+    public function validate(): bool
+    {
+        // Suppress libxml errors
+        libxml_use_internal_errors(true);
+
+        $xml = new XMLReader();
+        $xml->open($this->getXmlFileName());
+
+        // When the schema is provided, validate by the schema
+        if (! is_null($this->getXsdFileName())) {
+            $xml->setSchema($this->getXsdFileName());
+        }
+
+        // Perform a full read of the document to force validation
+        while ($xml->read()) {
+
+        };
+
+        // Determine if the full read was successful by counting the errors
+        return ! $this->hasErrors();
+    }
+
+    /**
+     * Determines if any XML errors are raised.
+     * @return bool
+     */
+    public function hasErrors(): bool
+    {
+        return count($this->getErrors()) !== 0;
+    }
+
+    /**
+     * Returns an array of LibXMLError objects or an empty array.
+     * @return array
+     */
+    public function getErrors(): array
+    {
+        return libxml_get_errors();
+    }
+}
diff --git a/tests/support/shiporder.xml b/tests/support/shiporder.xml
new file mode 100644
index 0000000..5e4a0d3
--- /dev/null
+++ b/tests/support/shiporder.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<shiporder orderid="889923">
+    <orderperson>John Smith</orderperson>
+    <shipto>
+        <name>Ola Nordmann</name>
+        <address>Langgt 23</address>
+        <city>4000 Stavanger</city>
+        <country>Norway</country>
+    </shipto>
+    <item>
+        <title>Empire Burlesque</title>
+        <note>Special Edition</note>
+        <quantity>1</quantity>
+        <price>10.90</price>
+    </item>
+    <item>
+        <title>Hide your heart</title>
+        <quantity>1</quantity>
+        <price>9.90</price>
+    </item>
+</shiporder>
diff --git a/tests/support/shiporder.xsd b/tests/support/shiporder.xsd
new file mode 100644
index 0000000..205430b
--- /dev/null
+++ b/tests/support/shiporder.xsd
@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
+
+    <!-- definition of simple elements -->
+    <xs:element name="orderperson" type="xs:string"/>
+    <xs:element name="name" type="xs:string"/>
+    <xs:element name="address" type="xs:string"/>
+    <xs:element name="city" type="xs:string"/>
+    <xs:element name="country" type="xs:string"/>
+    <xs:element name="title" type="xs:string"/>
+    <xs:element name="note" type="xs:string"/>
+    <xs:element name="quantity" type="xs:positiveInteger"/>
+    <xs:element name="price" type="xs:decimal"/>
+
+    <!-- definition of attributes -->
+    <xs:attribute name="orderid" type="xs:string"/>
+
+    <!-- definition of complex elements -->
+    <xs:element name="shipto">
+        <xs:complexType>
+            <xs:sequence>
+                <xs:element ref="name"/>
+                <xs:element ref="address"/>
+                <xs:element ref="city"/>
+                <xs:element ref="country"/>
+            </xs:sequence>
+        </xs:complexType>
+    </xs:element>
+
+    <xs:element name="item">
+        <xs:complexType>
+            <xs:sequence>
+                <xs:element ref="title"/>
+                <xs:element ref="note" minOccurs="0"/>
+                <xs:element ref="quantity"/>
+                <xs:element ref="price"/>
+            </xs:sequence>
+        </xs:complexType>
+    </xs:element>
+
+    <xs:element name="shiporder">
+        <xs:complexType>
+            <xs:sequence>
+                <xs:element ref="orderperson"/>
+                <xs:element ref="shipto"/>
+                <xs:element ref="item" maxOccurs="unbounded"/>
+            </xs:sequence>
+            <xs:attribute ref="orderid" use="required"/>
+        </xs:complexType>
+    </xs:element>
+
+</xs:schema>
\ No newline at end of file
diff --git a/tests/support/shiporder_invalid.xml b/tests/support/shiporder_invalid.xml
new file mode 100644
index 0000000..43749e9
--- /dev/null
+++ b/tests/support/shiporder_invalid.xml
@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<shiporder orderid="889923">
+    <orderperson>John Smith</orderperson>
+    <shipto>
+        <name>Ola Nordmann</name>
+        <address>Langgt 23</address>
+        <city>4000 Stavanger</city>
+        <country>Norway</country>
+        <@amount>2</amount>
+    </shipto>
+    <item>
+        <title>Empire Burlesque</title>
+        <note>Special Edition</note>
+        <quantity>1</quantity>
+        <price>10.90</price>
+    </item>
+    <item>
+        <title>Hide your heart</title>
+        <quantity>1</quantity>
+        <price>9.90</price>
+    </item>
+</shiporder>
diff --git a/tests/support/shiporder_invalid_to_schema.xml b/tests/support/shiporder_invalid_to_schema.xml
new file mode 100644
index 0000000..4ea2333
--- /dev/null
+++ b/tests/support/shiporder_invalid_to_schema.xml
@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<shiporder orderid="889923">
+    <orderperson>John Smith</orderperson>
+    <shipto>
+        <name>Ola Nordmann</name>
+        <address>Langgt 23</address>
+        <city>4000 Stavanger</city>
+        <country>Norway</country>
+        <amount>2</amount>
+    </shipto>
+    <item>
+        <title>Empire Burlesque</title>
+        <note>Special Edition</note>
+        <quantity>1</quantity>
+        <price>10.90</price>
+    </item>
+    <item>
+        <title>Hide your heart</title>
+        <quantity>1</quantity>
+        <price>9.90</price>
+    </item>
+</shiporder>
diff --git a/tests/unit/ValidatorTest.php b/tests/unit/ValidatorTest.php
new file mode 100644
index 0000000..fa40833
--- /dev/null
+++ b/tests/unit/ValidatorTest.php
@@ -0,0 +1,75 @@
+<?php
+
+namespace Vdhicts\Dicms\XmlValidator\Tests\Unit;
+
+use PHPUnit\Framework\TestCase;
+use Vdhicts\Dicms\XmlValidator;
+
+class ValidatorTest extends TestCase
+{
+    private $xmlFileName = __DIR__ . '/../support/shiporder.xml';
+    private $xmlFileNameInvalidToSchema = __DIR__ . '/../support/shiporder_invalid_to_schema.xml';
+    private $xmlFileNameInvalid = __DIR__ . '/../support/shiporder_invalid_to_schema.xml';
+    private $xsdFileName = __DIR__ . '/../support/shiporder.xsd';
+
+    public function testClassExists()
+    {
+        $this->assertTrue(class_exists(XmlValidator\Validator::class));
+    }
+
+    public function testInitialisation()
+    {
+        $validator = new XmlValidator\Validator($this->xmlFileName);
+
+        $this->assertInstanceOf(XmlValidator\Validator::class, $validator);
+    }
+
+    public function testXml()
+    {
+        $validator = new XmlValidator\Validator($this->xmlFileName);
+
+        $this->assertTrue($validator->validate());
+    }
+
+    public function testXmlMatchingToSchema()
+    {
+        $validator = new XmlValidator\Validator($this->xmlFileName, $this->xsdFileName);
+
+        $this->assertTrue($validator->validate());
+    }
+
+    public function testXmlNotMatchingToSchema()
+    {
+        $validator = new XmlValidator\Validator($this->xmlFileNameInvalidToSchema, $this->xsdFileName);
+
+        $this->assertFalse($validator->validate());
+    }
+
+    public function testInvalidXml()
+    {
+        $validator = new XmlValidator\Validator($this->xmlFileNameInvalid);
+
+        $this->assertFalse($validator->validate());
+    }
+
+    public function testInvalidXmlWithSchema()
+    {
+        $validator = new XmlValidator\Validator($this->xmlFileNameInvalid, $this->xsdFileName);
+
+        $this->assertFalse($validator->validate());
+    }
+
+    public function testInvalidXmlFileName()
+    {
+        $this->expectException(XmlValidator\Exceptions\XmlValidatorException::class);
+
+        new XmlValidator\Validator('randomFileName.xml');
+    }
+
+    public function testInvalidXsdFileName()
+    {
+        $this->expectException(XmlValidator\Exceptions\XmlValidatorException::class);
+
+        new XmlValidator\Validator($this->xmlFileName, 'randomFileName.xsd');
+    }
+}