The following is an example of Subtitle XML which creates three Soft Text effects applied to gaps at these timecodes:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE subtitle>
<subtitle version="1">
<name>SampleSubtitles</name>
<!-- Rate should be one of : -->
<!-- -->
<!-- * '23.976'-->
<!-- * '24'-->
<!-- * '25'-->
<!-- * '29.97 DF'-->
<!-- * '29.97 NDF' -->
<!-- * '30'-->
<!-- * '59.94 DF'-->
<!-- * '59.94 NDF' -->
<rate>24</rate>
<!-- Set width and height to default -->
<!-- if you want project default res -->
<!-- depth should be : -->
<!-- -->
<!-- * '8', '10' or '12'.-->
<!-- * default : for project default depth -->
<!-- aspect should be : -->
<!---->
<!-- * '1.77777'-->
<!-- * '1.333'-->
<!-- * default-->
<!-- scanformat should be : -->
<!---->
<!-- * 'f1' -->
<!-- * 'f2' -->
<!-- * default-->
<resolution>
<width>1920</width>
<height>1080</height>
<depth>8</depth>
<aspect>1.778</aspect>
<scanformat>default</scanformat>
</resolution>
<timecode>
<start>01:00:00;00</start>
<end>01:00:08;00</end>
</timecode>
<video>
<title>
<start>01:00:01;00</start>
<end>01:00:02;00</end>
<text>This is a subtitle string</text>
<font>Garamond</font>
<size>20</size>
<fontcolor>
<alpha>255</alpha>
<red>255</red>
<green>255</green>
<blue>255</blue>
</fontcolor>
<vertical>0</vertical>
<horizontal>0</horizontal>
<setup>/usr/discreet/project/test/text/paz.ttg</setup>
</title>
<title>
<start>01:00:03;00</start>
<end>01:00:04;00</end>
<text>This is another subtitle string</text>
<font>Garamond</font>
<size>20</size>
<fontcolor>
<alpha>255</alpha>
<red>255</red>
<green>255</green>
<blue>255</blue>
</fontcolor>
<vertical>100</vertical>
<horizontal>100</horizontal>
<setup>/usr/discreet/project/test/text/paz.ttg</setup>
</title>
<title>
<start>01:00:05;00</start>
<end>01:00:06;02</end>
<text>This is a third subtitle string</text>
<font>Garamond</font>
<size>20</size>
<fontcolor>
<alpha>255</alpha>
<red>255</red>
<green>255</green>
<blue>255</blue>
</fontcolor>
<vertical>-100</vertical>
<horizontal>-200</horizontal>
<setup>/usr/discreet/project/test/text/paz.ttg</setup>
</title>
</video>
</subtitle>