gem-graph-server/debian/var/models/example_II.xml

<?xml version="1.0" encoding="UTF-8"?>

<!-- TODO DTD or XML Schema-->

<gem-graph-model version="0.1">

  <!-- Model identity informations -->
  <identity>
    <name>Model created for testing purposes</name>
    <name value="(Three dimers)"/>
    <owner>Jean Sirmai</owner>
    <owner_id>2</owner_id>
    <date>1629830000</date>  <!--Warning: it's an arbitrary unchecked date...-->
    <version>1.0</version>

  </identity>

  <!-- Model parameters -->
  <parameters id="test" date="1629830000" author="Jean Sirmai">
    <modelization>
      <max_thread value="0"/>           <!--Why "0" ?-->
      <max_cycles value="13"/>

    </modelization>

    <space_param>
      <dimension value="1"/>
      <size x="39" y="0" z="0"/>
      <site_multiplicity value="2"/>    <!-- Indicates that there are two sites per cell-->
      <boundaries/>                     <!-- TODO -->

    </space_param>

  </parameters>

  <!-- Model objects definition -->
  <objects>
    <object id="dimer" date="1629830000" author="Jean Sirmai">
      <!-- A dimer is made of two linked adjacent particles.-->
      <!-- Site 1 of particle 0 points at east to next particle.-->
      <!-- Site 0 of particle 1 points at west to previous particle.-->
      <arrow x="0" y="0" z="0" site="0" weight="0"/>
      <arrow x="0" y="0" z="0" site="1" weight="1"/>
      <arrow x="1" y="0" z="0" site="0" weight="1"/>
      <arrow x="1" y="0" z="0" site="1" weight="0"/>

    </object>

  </objects>

  <!-- Space description (initial state) -->
  <space id="test" date="1629830000" author="Jean Sirmai">
    <arrow x="0"  y="0" z="0" site="1" weight="1"/>
    <arrow x="1"  y="0" z="0" site="0" weight="1"/>
    <arrow x="10" y="0" z="0" site="1" weight="1"/>
    <arrow x="11" y="0" z="0" site="0" weight="1"/>
    <arrow x="20" y="0" z="0" site="1" weight="1"/>
    <arrow x="21" y="0" z="0" site="0" weight="1"/>
    <!-- three dimers have been defined-->

  </space>

  <!-- Saved space description (saved states) -->
  <savestates id="test" date="1629830000" author="Jean Sirmai">
    <space id="test" date="1629830000" author="Jean Sirmai">
    </space>

  </savestates>

  <!-- Model transitions definition (rules) -->
  <transitions id="test" date="1629830000" author="Jean Sirmai">
    <transition id="0" date="1629830000" author="Jean Sirmai" probability="1">   <!-- moves a dimer to east-->
      <if>
        <arrow x="0" y="0" z="0" site="1" weight="1"/>
        <arrow x="1" y="0" z="0" site="0" weight="1"/>      <!-- a dimer is identified-->
                                                            <!-- the local space origin is its "west" particule-->
        <arrow x="2" y="0" z="0" site="1" weight="0"/>      <!-- the east location next this dimer is empty-->
        <arrow x="3" y="0" z="0" site="0" weight="0"/>      <!-- In this very simple model, I do not need to check this condition-->

      </if>

      <then>                                                <!-- Therefore I can (and I want to) move it to its next east location-->
        <arrow x="0" y="0" z="0" site="1" weight="0"/>
        <arrow x="1" y="0" z="0" site="0" weight="0"/>      <!-- The identified dimer no more exists  ( :-(( -->
        <arrow x="1" y="0" z="0" site="1" weight="1"/>
        <arrow x="2" y="0" z="0" site="0" weight="1"/>      <!-- Happily, it is now rebuilt at its east location  ( ;-))-->

      </then>

    </transition>

  </transitions>

  <!-- Non context-specific tags -->
  <ref id="Best reference!" date="1629830000" author="Jean Sirmai" lang="fr">
    https://www.a-lec.org
  </ref>
  <quote id="Best quote" date="1629830000" author="Jean Sirmai" lang="fr">
    This is a quote.
  </quote>

</gem-graph-model>