Tests/feaLib/data/ZeroValue_ChainSinglePos_horizontal.ttx

<?xml version="1.0" encoding="UTF-8"?>
<ttFont sfntVersion="true" ttLibVersion="3.7">

  <GPOS>
    <Version value="0x00010000"/>
    <ScriptList>
      <!-- ScriptCount=1 -->
      <ScriptRecord index="0">
        <ScriptTag value="DFLT"/>
        <Script>
          <DefaultLangSys>
            <ReqFeatureIndex value="65535"/>
            <!-- FeatureCount=1 -->
            <FeatureIndex index="0" value="0"/>
          </DefaultLangSys>
          <!-- LangSysCount=0 -->
        </Script>
      </ScriptRecord>
    </ScriptList>
    <FeatureList>
      <!-- FeatureCount=1 -->
      <FeatureRecord index="0">
        <FeatureTag value="kern"/>
        <Feature>
          <!-- LookupCount=1 -->
          <LookupListIndex index="0" value="0"/>
        </Feature>
      </FeatureRecord>
    </FeatureList>
    <LookupList>
      <!-- LookupCount=2 -->
      <Lookup index="0">
        <LookupType value="8"/>
        <LookupFlag value="0"/>
        <!-- SubTableCount=1 -->
        <ChainContextPos index="0" Format="1">
          <Coverage>
            <Glyph value="G"/>
          </Coverage>
          <!-- ChainPosRuleSetCount=1 -->
          <ChainPosRuleSet index="0">
            <!-- ChainPosRuleCount=2 -->
            <ChainPosRule index="0">
              <!-- BacktrackGlyphCount=1 -->
              <Backtrack index="0" value="A"/>
              <!-- InputGlyphCount=1 -->
              <!-- LookAheadGlyphCount=1 -->
              <LookAhead index="0" value="A"/>
              <!-- PosCount=1 -->
              <PosLookupRecord index="0">
                <SequenceIndex value="0"/>
                <LookupListIndex value="1"/>
              </PosLookupRecord>
            </ChainPosRule>
            <ChainPosRule index="1">
              <!-- BacktrackGlyphCount=1 -->
              <Backtrack index="0" value="B"/>
              <!-- InputGlyphCount=1 -->
              <!-- LookAheadGlyphCount=1 -->
              <LookAhead index="0" value="B"/>
              <!-- PosCount=1 -->
              <PosLookupRecord index="0">
                <SequenceIndex value="0"/>
                <LookupListIndex value="1"/>
              </PosLookupRecord>
            </ChainPosRule>
          </ChainPosRuleSet>
        </ChainContextPos>
      </Lookup>
      <Lookup index="1">
        <LookupType value="1"/>
        <LookupFlag value="0"/>
        <!-- SubTableCount=1 -->
        <SinglePos index="0" Format="1">
          <Coverage>
            <Glyph value="G"/>
          </Coverage>
          <ValueFormat value="0"/>
        </SinglePos>
      </Lookup>
    </LookupList>
  </GPOS>

</ttFont>