diff --git a/Backend-libXML/Parser.py b/Backend-libXML/Parser.py
new file mode 100644
index 0000000..ca60571
--- /dev/null
+++ b/Backend-libXML/Parser.py
@@ -0,0 +1,56 @@
+from lxml import etree
+
+
+def xpath(source: str, xpath: str) -> str:
+    """
+    Method used to get nodes from XML string using XPath
+    :param source: XML string used for selection
+    :param xpath: XPath query used for selection
+    :return: Nodes selected using XPath
+    """
+    root = etree.XML(source)
+    nsmap = root.nsmap
+
+    # LXML doesn't accept namespace with None key,
+    # so it need to be deleted if exists
+    try:
+        nsmap.pop(None)
+    except KeyError:
+        print(end="")
+
+    result = root.xpath(xpath, namespaces=nsmap)
+    result_string = ""
+    for e in result:
+        result_string += etree.tostring(e, pretty_print=True).decode() + "\n"
+    return result_string
+
+
+
+def xsd(source: str, xsd: str) -> bool:
+    """
+    Method used to validate XML string against XSD schema
+    :param source: XML string used for validation
+    :param xsd: XSD schema to validate XML against
+    :return: If the validation was successful or not
+    """
+    xml_schema = etree.XMLSchema(etree.XML(xsd))
+
+    xml = etree.XML(source)
+
+    return xml_schema.validate(xml)
+    
+    
+def xslt(source: str, xslt: str) -> str:
+    """
+    Method used to transformate XML string using XSLT
+    :param source: Transformed XML string
+    :param xslt: XSLT string used to transformate XML
+    :return: Result of transformation
+    """
+    xslt_transform = etree.XSLT(etree.XML(xslt))
+
+    xml = etree.XML(source)
+
+    transformated = xslt_transform(xml)
+    print(transformated)
+    return str(transformated)
\ No newline at end of file
diff --git a/Backend-libXML/__pycache__/Parser.cpython-310.pyc b/Backend-libXML/__pycache__/Parser.cpython-310.pyc
new file mode 100644
index 0000000..a6014e1
Binary files /dev/null and b/Backend-libXML/__pycache__/Parser.cpython-310.pyc differ
diff --git a/Backend-libXML/__pycache__/server.cpython-310.pyc b/Backend-libXML/__pycache__/server.cpython-310.pyc
new file mode 100644
index 0000000..6fdb3a0
Binary files /dev/null and b/Backend-libXML/__pycache__/server.cpython-310.pyc differ
diff --git a/Backend-libXML/main.py b/Backend-libXML/main.py
new file mode 100644
index 0000000..9dbe0d8
--- /dev/null
+++ b/Backend-libXML/main.py
@@ -0,0 +1,17 @@
+import Parser
+
+
+if __name__ == '__main__':
+    SOURCE = "sample/xslt.xml"
+    XSLT = "sample/sample.xslt"
+
+    file = open(SOURCE, "r")
+    xml = file.read()
+    file.close()
+
+    file = open(XSLT, "r")
+    xslt = file.read()
+    print(Parser.xslt(xml, xslt))
+
+    file.close()
+
diff --git a/Backend-libXML/sample/xpath.curl b/Backend-libXML/sample/xpath.curl
new file mode 100644
index 0000000..f72790a
--- /dev/null
+++ b/Backend-libXML/sample/xpath.curl
@@ -0,0 +1,5 @@
+#url = "localhost:8081/xpathpost"
+url = "localhost:5000/xpath"
+request = "POST"
+data = "@xpath.json"
+header = "Content-Type: application/json"
diff --git a/Backend-libXML/sample/xpath.json b/Backend-libXML/sample/xpath.json
new file mode 100644
index 0000000..70faa16
--- /dev/null
+++ b/Backend-libXML/sample/xpath.json
@@ -0,0 +1,6 @@
+{
+  "data": "<?xml version='1.0' encoding='utf-8'?><books><book id='1'><name>Hamlet</name><date>2001-05-04</date><authorId>1</authorId><availability>false</availability></book><book id='2'><name>Macbeth</name><date>2000-12-13</date><authorId>1</authorId><availability>false</availability></book><book id='3'><name>Harry Potter and the Sorcerer's Stone</name><date>2005-04-29</date><authorId>2</authorId><availability>true</availability></book><book id='4'><name>The Long Walk</name><date>2018-07-01</date><authorId>4</authorId><availability>true</availability></book><book id='5'><name>Misery</name><date>2018-01-31</date><authorId>4</authorId><availability>true</availability></book><book id='6'><name>Think and Grow Rich</name><date>2004-09-10</date><authorId>6</authorId><availability>true</availability></book><book id='7'><name>The Law of Success</name><date>1982-05-09</date><authorId>6</authorId><availability>false</availability></book><book id='8'><name>Patriot Games</name><date>1995-10-21</date><authorId>5</authorId><availability>false</availability></book><book id='9'><name>The Sum of All Fears</name><date>1992-09-19</date><authorId>5</authorId><availability>false</availability></book><book id='10'><name>The Alchemist</name><date>2017-02-20</date><authorId>3</authorId><availability>false</availability></book><book id='11'><name>Hamlet</name><date>1994-06-01</date><authorId>1</authorId><availability>false</availability></book><book id='12'><name>Measure for Measure</name><date>1990-03-23</date><authorId>1</authorId><availability>false</availability></book><book id='13'><name>Hamlet</name><date>1989-05-05</date><authorId>1</authorId><availability>true</availability></book><book id='14'><name>Hamlet</name><date>1999-05-30</date><authorId>1</authorId><availability>true</availability></book><book id='15'><name>The Law of Success</name><date>2004-11-26</date><authorId>6</authorId><availability>true</availability></book><book id='16'><name>Romeo and Juliet</name><date>1997-02-08</date><authorId>1</authorId><availability>true</availability></book><book id='17'><name>The Alchemist</name><date>2009-08-21</date><authorId>3</authorId><availability>true</availability></book></books>",
+  "process": "/books/book[name = 'The Law of Success']",
+  "processor": "saxon",
+  "version": "2.0"
+}
diff --git a/Backend-libXML/sample/xsd.curl b/Backend-libXML/sample/xsd.curl
new file mode 100644
index 0000000..615fff6
--- /dev/null
+++ b/Backend-libXML/sample/xsd.curl
@@ -0,0 +1,4 @@
+url = "http://localhost:5000/xsd"
+data = "@xsd.json"
+header = "Content-Type: application/json"
+request = POST
diff --git a/Backend-libXML/sample/xsd.json b/Backend-libXML/sample/xsd.json
new file mode 100644
index 0000000..91dd2f2
--- /dev/null
+++ b/Backend-libXML/sample/xsd.json
@@ -0,0 +1,6 @@
+{
+    "data": "<ns0:values xmlns:ns0 = \"http://www.tibco.com/schemas/test/Test/Resources/Schema.xsd\"><ns0:value>Test</ns0:value><ns0:value>Test3</ns0:value></ns0:values>",
+    "process": "<xs:schema xmlns:xs=\"http://www.w3.org/2001/XMLSchema\" xmlns=\"http://www.tibco.com/schemas/test/Test/Resources/Schema.xsd\" targetNamespace=\"http://www.tibco.com/schemas/test/Test/Resources/Schema.xsd\" elementFormDefault=\"qualified\" attributeFormDefault=\"unqualified\"> <xs:element name=\"values\"><xs:complexType><xs:sequence><xs:element name=\"value\" type=\"xs:string\" minOccurs=\"0\" maxOccurs=\"unbounded\"/></xs:sequence></xs:complexType></xs:element></xs:schema>",
+    "processor": "saxon",
+    "version": "1.0"
+}
diff --git a/Backend-libXML/sample/xslt.curl b/Backend-libXML/sample/xslt.curl
new file mode 100644
index 0000000..b5099ff
--- /dev/null
+++ b/Backend-libXML/sample/xslt.curl
@@ -0,0 +1,4 @@
+url = "http://localhost:5000/xslt"
+data = "@xslt.json"
+header = "Content-Type: application/json"
+request = POST
diff --git a/Backend-libXML/sample/xslt.json b/Backend-libXML/sample/xslt.json
new file mode 100644
index 0000000..f833a40
--- /dev/null
+++ b/Backend-libXML/sample/xslt.json
@@ -0,0 +1,6 @@
+{
+    "data": "<b:books xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns='http://www.demo.com' xmlns:b='http://www.book.com' xmlns:a='http://www.author.com'><b:book id='1'><b:name>Hamlet</b:name><b:date>2001-05-04</b:date><a:authorId>1</a:authorId><b:availability>false</b:availability></b:book><b:book id='2'><b:name>Macbeth</b:name><b:date>2000-12-13</b:date><a:authorId>1</a:authorId><b:availability>false</b:availability></b:book><b:book id='3'><b:name>Harry Potter and the Sorcerer's Stone</b:name><b:date>2005-04-29</b:date><a:authorId>2</a:authorId><b:availability>true</b:availability></b:book><b:book id='4'><b:name>The Long Walk</b:name><b:date>2018-07-01</b:date><a:authorId>4</a:authorId><b:availability>true</b:availability></b:book><b:book id='5'><b:name>Misery</b:name><b:date>2018-01-31</b:date><a:authorId>4</a:authorId><b:availability>true</b:availability></b:book><b:book id='6'><b:name>Think and Grow Rich</b:name><b:date>2004-09-10</b:date><a:authorId>6</a:authorId><b:availability>true</b:availability></b:book><b:book id='7'><b:name>The Law of Success</b:name><b:date>1982-05-09</b:date><a:authorId>6</a:authorId><b:availability>false</b:availability></b:book><b:book id='8'><b:name>Patriot Games</b:name><b:date>1995-10-21</b:date><a:authorId>5</a:authorId><b:availability>false</b:availability></b:book><b:book id='9'><b:name>The Sum of All Fears</b:name><b:date>1992-09-19</b:date><a:authorId>5</a:authorId><b:availability>false</b:availability></b:book><b:book id='10'><b:name>The Alchemist</b:name><b:date>2017-02-20</b:date><a:authorId>3</a:authorId><b:availability>false</b:availability></b:book><b:book id='11'><b:name>Hamlet</b:name><b:date>1994-06-01</b:date><a:authorId>1</a:authorId><b:availability>false</b:availability></b:book><b:book id='12'><b:name>Measure for Measure</b:name><b:date>1990-03-23</b:date><a:authorId>1</a:authorId><b:availability>false</b:availability></b:book><b:book id='13'><b:name>Hamlet</b:name><b:date>1989-05-05</b:date><a:authorId>1</a:authorId><b:availability>true</b:availability></b:book><b:book id='14'><b:name>Hamlet</b:name><b:date>1999-05-30</b:date><a:authorId>1</a:authorId><b:availability>true</b:availability></b:book><b:book id='15'><b:name>The Law of Success</b:name><b:date>2004-11-26</b:date><a:authorId>6</a:authorId><b:availability>true</b:availability></b:book><b:book id='16'><b:name>Romeo and Juliet</b:name><b:date>1997-02-08</b:date><a:authorId>1</a:authorId><b:availability>true</b:availability></b:book><b:book id='17'><b:name>The Alchemist</b:name><b:date>2009-08-21</b:date><a:authorId>3</a:authorId><b:availability>true</b:availability></b:book></b:books>",
+    "process": "<xsl:stylesheet version='1.0' xmlns:xsl='http://www.w3.org/1999/XSL/Transform' xmlns:b='http://www.demo.com'><xsl:template match='b:books'><Library><BookCount><xsl:value-of select='count(b:book)' /></BookCount></Library></xsl:template></xsl:stylesheet>",
+    "processor": "saxon",
+    "version": "1.0"
+}
diff --git a/Backend-libXML/server.py b/Backend-libXML/server.py
new file mode 100644
index 0000000..b34ce99
--- /dev/null
+++ b/Backend-libXML/server.py
@@ -0,0 +1,69 @@
+from flask import Flask
+from flask import request
+from lxml import etree
+import json
+import time
+import Parser
+
+
+app = Flask(__name__)
+
+@app.route("/xpath", methods=["POST"])
+def xpath():
+    request_data = request.get_json()
+    xml = request_data['data']
+    xpath = request_data['process']
+    
+    response = dict()
+    start = time.time_ns()
+    try:
+        response['result'] = Parser.xpath(xml, xpath)
+        response['status'] = "OK"
+    except BaseException as e:
+        response['result'] = str(e)
+        response['status'] = "ERR"
+    finally:
+        exec_time = (time.time_ns() - start) / 10**6
+        response['time'] = f"{exec_time:.03f}"
+        response['processor'] = "libxml2 over lxml"
+        return json.dumps(response)
+
+@app.route("/xsd", methods=["POST"])
+def xsd():
+    request_data = request.get_json()
+    xml = request_data['data']
+    xsd = request_data['process']
+
+    response = dict()
+    start = time.time_ns()
+    try:
+        response['result'] = Parser.xsd(xml, xsd)
+        response['status'] = "OK"
+    except BaseException as e:
+        response['result'] = str(e)
+        response['status'] = "ERR"
+    finally:
+        exec_time = (time.time_ns() - start) / 10**6
+        response['time'] = f"{exec_time:.03f}"
+        response['processor'] = "libxml2 over lxml"
+        return json.dumps(response)
+
+@app.route("/xslt", methods=["POST"])
+def xslt():
+    request_data = request.get_json()
+    xml = request_data['data']
+    xslt = request_data['process']
+
+    response = dict()
+    start = time.time_ns()
+    try:
+        response['result'] = Parser.xslt(xml, xslt)
+        response['status'] = "OK"
+    except BaseException as e:
+        response['result'] = str(e)
+        response['status'] = "ERR"
+    finally:
+        exec_time = (time.time_ns() - start) / 10**6
+        response['time'] = f"{exec_time:.03f}"
+        response['processor'] = "libxml2 over lxml"
+        return json.dumps(response)
\ No newline at end of file