Dev:Maintenance facility

<?xml version="1.0" encoding="UTF-8"?>
<railml xmlns="https://www.railml.org/schemas/2021"
        xmlns:dc="http://purl.org/dc/elements/1.1/"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="https://www.railml.org/schemas/2021 https://schemas.railml.org/2021/railML-2.5/schema/railML.xsd"
        version="2.5">
  <infrastructure id="inf01">
    <tracks>
      <track id="tr01"
             name="track a02"
             type="secondaryTrack"
             mainDir="none">
        <trackTopology>
          <trackBegin pos="0"
                      id="tr01_tb">
            <bufferStop id="tr01_bs01"/>
          </trackBegin>
          <trackEnd pos="500"
                    id="tr01_te">
            <connection ref="tr03_c03"
                        id="tr01_c01"/>
          </trackEnd>
          <crossSections>
            <crossSection id="tr01_cs01"
                          name="Gleis 1"
                          xml:lang="de"
                          ocpRef="ocp01"
                          pos="300.0"
                          absPos="300.0"
                          type="station"/>
          </crossSections>
        </trackTopology>
        <trackElements>
          <serviceSections>
            <serviceSection id="tr01_ss01"
                            name="section 2"
                            xml:lang="en"
                            pos="200"
                            dir="up"
                            absPos="200"
                            ocpRef="ocp01"
                            maintenance="true"/>
          </serviceSections>
        </trackElements>
      </track>
    </tracks>
    <operationControlPoints>
      <ocp id="ocp01"
           name="Bf Cstadt"
           xml:lang="de"
           type="operationalName">
        <propEquipment>
          <trackRef ref="tr01"/>
        </propEquipment>
      </ocp>
    </operationControlPoints>
  </infrastructure>
</railml>