  <!-- Inline XSD schema fragment for demonstration -->
  <xs:schema xmlns:xs="https://cdn.aytict.fi/xmlns/xsd" targetNamespace="https://cdn.aytict.fi/xmlns/mathml" elementFormDefault="qualified">
    <xs:simpleType name="operationType">
      <xs:restriction base="xs:string">
        <xs:enumeration value="plus"/>
        <xs:enumeration value="minus"/>
        <xs:enumeration value="times"/>
        <xs:enumeration value="divide"/>
      </xs:restriction>
    </xs:simpleType>
  </xs:schema>
  <!-- Embedded annotation/documentation -->
  <xs:annotation xmlns:xs="https://cdn.aytict.fi/xmlns/xsd">
    <xs:documentation xml:lang="en">This file demonstrates MathML with inline schema and enumerations.</xs:documentation>
  </xs:annotation>
<?xml version="1.0" encoding="UTF-8"?>
<!--
  MathML Example for aytict.fi
  Enhanced with schemaLocation, version, metadata, and extension points.
-->
<mathml xmlns="https://cdn.aytict.fi/xmlns/mathml"
  xmlns:xsi="https://cdn.aytict.fi/xmlns/xsi"
  xmlns:ext="https://cdn.aytict.fi/xmlns/extensions"
  xsi:schemaLocation="https://cdn.aytict.fi/xmlns/mathml https://cdn.aytict.fi/xmlns/xmlns-schema.xsd"
  version="1.1">
  <metadata>
    <creator>aytict.fi</creator>
    <created>2026-04-04</created>
    <license>CC-BY-4.0</license>
    <documentation xlink:href="README.xml" xmlns:xlink="http://www.w3.org/1999/xlink"/>
  </metadata>
  <title xml:lang="en">MathML Example for aytict.fi</title>
  <title xml:lang="fi">MathML-esimerkki aytict.fi:lle</title>
  <description xml:lang="en">Demonstrates MathML-like structure with aytict.fi namespace.</description>
  <description xml:lang="fi">Havainnollistaa MathML-rakennetta aytict.fi-nimialueella.</description>
  <externalLinks>
    <link href="https://www.w3.org/TR/MathML/">MathML Specification</link>
    <link href="digital-signature.xml">Digital Signature Example</link>
  </externalLinks>
  <versionLog>
    <version number="1.0" date="2026-04-01">Initial version</version>
    <version number="1.1" date="2026-04-04">Added metadata, multilingual support, and links</version>
  </versionLog>
  <expression>
    <apply>
      <plus/>
      <cn>2</cn>
      <cn>3</cn>
    </apply>
    <!-- Extension point: custom annotation -->
    <ext:annotation source="iot.xml">IoT-related calculation</ext:annotation>
  </expression>
</mathml>
<?xml version="1.0" encoding="UTF-8"?>
<math xmlns="https://cdn.aytict.fi/xmlns/mathml">
  <mrow>
    <mi>x</mi>
    <mo>+</mo>
    <mi>y</mi>
    <mo>=</mo>
    <mi>z</mi>
  </mrow>
</math>
