我就使用了一个命令行 xDoc=xmlread('Montage_100.xml'），显示的xDoc =[#document: null]
为什么？？求助我的xml文件部分内容：
<?xml version="1.0" encoding="UTF-8"?>
<!-- generated: 2009-02-05T14:46:33-08:00 -->
<!-- generated by: shishir [??] -->
<adag xmlns="http://pegasus.isi.edu/schema/DAX" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://pegasus.isi.edu/schema/DAX http://pegasus.isi.edu/schema/dax-2.1.xsd" version="2.1" count="1" index="0" name="test" jobCount="100" fileCount="0" childCount="84">
<!-- part 1: list of all referenced files (may be empty) -->
<!-- part 2: definition of all jobs (at least one) -->
<job id="ID00000" namespace="Montage" name="mProjectPP" version="1.0" runtime="13.85">
<uses file="region.hdr" link="input" register="true" transfer="true" optional="false" type="data" size="304"/>
<uses file="2mass-atlas-ID00000s-jID00000.fits" link="input" register="true" transfer="true" optional="false" type="data" size="4222080"/>
<uses file="p2mass-atlas-ID00000s-jID00000.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4157716"/>
<uses file="p2mass-atlas-ID00000s-jID00000_area.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4157716"/>
</job>
<job id="ID00001" namespace="Montage" name="mProjectPP" version="1.0" runtime="13.11">
<uses file="region.hdr" link="input" register="true" transfer="true" optional="false" type="data" size="304"/>
<uses file="2mass-atlas-ID00001s-jID00001.fits" link="input" register="true" transfer="true" optional="false" type="data" size="4222080"/>
<uses file="p2mass-atlas-ID00001s-jID00001.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4183167"/>
<uses file="p2mass-atlas-ID00001s-jID00001_area.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4183167"/>
</job>
<job id="ID00002" namespace="Montage" name="mProjectPP" version="1.0" runtime="13.42">
<uses file="region.hdr" link="input" register="true" transfer="true" optional="false" type="data" size="304"/>
<uses file="2mass-atlas-ID00002s-jID00002.fits" link="input" register="true" transfer="true" optional="false" type="data" size="4222080"/>
<uses file="p2mass-atlas-ID00002s-jID00002.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4163104"/>
<uses file="p2mass-atlas-ID00002s-jID00002_area.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4163104"/>
</job>
<job id="ID00003" namespace="Montage" name="mProjectPP" version="1.0" runtime="13.30">
<uses file="region.hdr" link="input" register="true" transfer="true" optional="false" type="data" size="304"/>
<uses file="2mass-atlas-ID00003s-jID00003.fits" link="input" register="true" transfer="true" optional="false" type="data" size="4222080"/>
<uses file="p2mass-atlas-ID00003s-jID00003.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4160478"/>
<uses file="p2mass-atlas-ID00003s-jID00003_area.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4160478"/>
</job>
<job id="ID00004" namespace="Montage" name="mProjectPP" version="1.0" runtime="13.16">
<uses file="region.hdr" link="input" register="true" transfer="true" optional="false" type="data" size="304"/>
<uses file="2mass-atlas-ID00004s-jID00004.fits" link="input" register="true" transfer="true" optional="false" type="data" size="4222080"/>
<uses file="p2mass-atlas-ID00004s-jID00004.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4146308"/>
<uses file="p2mass-atlas-ID00004s-jID00004_area.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4146308"/>
</job>
<job id="ID00005" namespace="Montage" name="mProjectPP" version="1.0" runtime="13.57">
<uses file="region.hdr" link="input" register="true" transfer="true" optional="false" type="data" size="304"/>
<uses file="2mass-atlas-ID00005s-jID00005.fits" link="input" register="true" transfer="true" optional="false" type="data" size="4222080"/>
<uses file="p2mass-atlas-ID00005s-jID00005.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4157375"/>
<uses file="p2mass-atlas-ID00005s-jID00005_area.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4157375"/>
</job>
<job id="ID00006" namespace="Montage" name="mProjectPP" version="1.0" runtime="13.25">
<uses file="region.hdr" link="input" register="true" transfer="true" optional="false" type="data" size="304"/>
<uses file="2mass-atlas-ID00006s-jID00006.fits" link="input" register="true" transfer="true" optional="false" type="data" size="4222080"/>
<uses file="p2mass-atlas-ID00006s-jID00006.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4149715"/>
<uses file="p2mass-atlas-ID00006s-jID00006_area.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4149715"/>
</job>
<job id="ID00007" namespace="Montage" name="mProjectPP" version="1.0" runtime="13.65">
<uses file="region.hdr" link="input" register="true" transfer="true" optional="false" type="data" size="304"/>
<uses file="2mass-atlas-ID00007s-jID00007.fits" link="input" register="true" transfer="true" optional="false" type="data" size="4222080"/>
<uses file="p2mass-atlas-ID00007s-jID00007.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4151438"/>
<uses file="p2mass-atlas-ID00007s-jID00007_area.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4151438"/>
</job>
<job id="ID00008" namespace="Montage" name="mProjectPP" version="1.0" runtime="13.63">
<uses file="region.hdr" link="input" register="true" transfer="true" optional="false" type="data" size="304"/>
<uses file="2mass-atlas-ID00008s-jID00008.fits" link="input" register="true" transfer="true" optional="false" type="data" size="4222080"/>
<uses file="p2mass-atlas-ID00008s-jID00008.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4158069"/>
<uses file="p2mass-atlas-ID00008s-jID00008_area.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4158069"/>
</job>
<job id="ID00009" namespace="Montage" name="mProjectPP" version="1.0" runtime="13.70">
<uses file="region.hdr" link="input" register="true" transfer="true" optional="false" type="data" size="304"/>
<uses file="2mass-atlas-ID00009s-jID00009.fits" link="input" register="true" transfer="true" optional="false" type="data" size="4222080"/>
<uses file="p2mass-atlas-ID00009s-jID00009.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4162206"/>
<uses file="p2mass-atlas-ID00009s-jID00009_area.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4162206"/>
</job>
<job id="ID00010" namespace="Montage" name="mProjectPP" version="1.0" runtime="13.55">
<uses file="region.hdr" link="input" register="true" transfer="true" optional="false" type="data" size="304"/>
<uses file="2mass-atlas-ID00010s-jID00010.fits" link="input" register="true" transfer="true" optional="false" type="data" size="4222080"/>
<uses file="p2mass-atlas-ID00010s-jID00010.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4156691"/>
<uses file="p2mass-atlas-ID00010s-jID00010_area.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4156691"/>
</job>
<job id="ID00011" namespace="Montage" name="mProjectPP" version="1.0" runtime="13.81">
<uses file="region.hdr" link="input" register="true" transfer="true" optional="false" type="data" size="304"/>
<uses file="2mass-atlas-ID00011s-jID00011.fits" link="input" register="true" transfer="true" optional="false" type="data" size="4222080"/>
<uses file="p2mass-atlas-ID00011s-jID00011.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4164317"/>
为什么？？求助我的xml文件部分内容：
<?xml version="1.0" encoding="UTF-8"?>
<!-- generated: 2009-02-05T14:46:33-08:00 -->
<!-- generated by: shishir [??] -->
<adag xmlns="http://pegasus.isi.edu/schema/DAX" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://pegasus.isi.edu/schema/DAX http://pegasus.isi.edu/schema/dax-2.1.xsd" version="2.1" count="1" index="0" name="test" jobCount="100" fileCount="0" childCount="84">
<!-- part 1: list of all referenced files (may be empty) -->
<!-- part 2: definition of all jobs (at least one) -->
<job id="ID00000" namespace="Montage" name="mProjectPP" version="1.0" runtime="13.85">
<uses file="region.hdr" link="input" register="true" transfer="true" optional="false" type="data" size="304"/>
<uses file="2mass-atlas-ID00000s-jID00000.fits" link="input" register="true" transfer="true" optional="false" type="data" size="4222080"/>
<uses file="p2mass-atlas-ID00000s-jID00000.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4157716"/>
<uses file="p2mass-atlas-ID00000s-jID00000_area.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4157716"/>
</job>
<job id="ID00001" namespace="Montage" name="mProjectPP" version="1.0" runtime="13.11">
<uses file="region.hdr" link="input" register="true" transfer="true" optional="false" type="data" size="304"/>
<uses file="2mass-atlas-ID00001s-jID00001.fits" link="input" register="true" transfer="true" optional="false" type="data" size="4222080"/>
<uses file="p2mass-atlas-ID00001s-jID00001.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4183167"/>
<uses file="p2mass-atlas-ID00001s-jID00001_area.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4183167"/>
</job>
<job id="ID00002" namespace="Montage" name="mProjectPP" version="1.0" runtime="13.42">
<uses file="region.hdr" link="input" register="true" transfer="true" optional="false" type="data" size="304"/>
<uses file="2mass-atlas-ID00002s-jID00002.fits" link="input" register="true" transfer="true" optional="false" type="data" size="4222080"/>
<uses file="p2mass-atlas-ID00002s-jID00002.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4163104"/>
<uses file="p2mass-atlas-ID00002s-jID00002_area.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4163104"/>
</job>
<job id="ID00003" namespace="Montage" name="mProjectPP" version="1.0" runtime="13.30">
<uses file="region.hdr" link="input" register="true" transfer="true" optional="false" type="data" size="304"/>
<uses file="2mass-atlas-ID00003s-jID00003.fits" link="input" register="true" transfer="true" optional="false" type="data" size="4222080"/>
<uses file="p2mass-atlas-ID00003s-jID00003.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4160478"/>
<uses file="p2mass-atlas-ID00003s-jID00003_area.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4160478"/>
</job>
<job id="ID00004" namespace="Montage" name="mProjectPP" version="1.0" runtime="13.16">
<uses file="region.hdr" link="input" register="true" transfer="true" optional="false" type="data" size="304"/>
<uses file="2mass-atlas-ID00004s-jID00004.fits" link="input" register="true" transfer="true" optional="false" type="data" size="4222080"/>
<uses file="p2mass-atlas-ID00004s-jID00004.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4146308"/>
<uses file="p2mass-atlas-ID00004s-jID00004_area.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4146308"/>
</job>
<job id="ID00005" namespace="Montage" name="mProjectPP" version="1.0" runtime="13.57">
<uses file="region.hdr" link="input" register="true" transfer="true" optional="false" type="data" size="304"/>
<uses file="2mass-atlas-ID00005s-jID00005.fits" link="input" register="true" transfer="true" optional="false" type="data" size="4222080"/>
<uses file="p2mass-atlas-ID00005s-jID00005.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4157375"/>
<uses file="p2mass-atlas-ID00005s-jID00005_area.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4157375"/>
</job>
<job id="ID00006" namespace="Montage" name="mProjectPP" version="1.0" runtime="13.25">
<uses file="region.hdr" link="input" register="true" transfer="true" optional="false" type="data" size="304"/>
<uses file="2mass-atlas-ID00006s-jID00006.fits" link="input" register="true" transfer="true" optional="false" type="data" size="4222080"/>
<uses file="p2mass-atlas-ID00006s-jID00006.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4149715"/>
<uses file="p2mass-atlas-ID00006s-jID00006_area.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4149715"/>
</job>
<job id="ID00007" namespace="Montage" name="mProjectPP" version="1.0" runtime="13.65">
<uses file="region.hdr" link="input" register="true" transfer="true" optional="false" type="data" size="304"/>
<uses file="2mass-atlas-ID00007s-jID00007.fits" link="input" register="true" transfer="true" optional="false" type="data" size="4222080"/>
<uses file="p2mass-atlas-ID00007s-jID00007.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4151438"/>
<uses file="p2mass-atlas-ID00007s-jID00007_area.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4151438"/>
</job>
<job id="ID00008" namespace="Montage" name="mProjectPP" version="1.0" runtime="13.63">
<uses file="region.hdr" link="input" register="true" transfer="true" optional="false" type="data" size="304"/>
<uses file="2mass-atlas-ID00008s-jID00008.fits" link="input" register="true" transfer="true" optional="false" type="data" size="4222080"/>
<uses file="p2mass-atlas-ID00008s-jID00008.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4158069"/>
<uses file="p2mass-atlas-ID00008s-jID00008_area.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4158069"/>
</job>
<job id="ID00009" namespace="Montage" name="mProjectPP" version="1.0" runtime="13.70">
<uses file="region.hdr" link="input" register="true" transfer="true" optional="false" type="data" size="304"/>
<uses file="2mass-atlas-ID00009s-jID00009.fits" link="input" register="true" transfer="true" optional="false" type="data" size="4222080"/>
<uses file="p2mass-atlas-ID00009s-jID00009.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4162206"/>
<uses file="p2mass-atlas-ID00009s-jID00009_area.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4162206"/>
</job>
<job id="ID00010" namespace="Montage" name="mProjectPP" version="1.0" runtime="13.55">
<uses file="region.hdr" link="input" register="true" transfer="true" optional="false" type="data" size="304"/>
<uses file="2mass-atlas-ID00010s-jID00010.fits" link="input" register="true" transfer="true" optional="false" type="data" size="4222080"/>
<uses file="p2mass-atlas-ID00010s-jID00010.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4156691"/>
<uses file="p2mass-atlas-ID00010s-jID00010_area.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4156691"/>
</job>
<job id="ID00011" namespace="Montage" name="mProjectPP" version="1.0" runtime="13.81">
<uses file="region.hdr" link="input" register="true" transfer="true" optional="false" type="data" size="304"/>
<uses file="2mass-atlas-ID00011s-jID00011.fits" link="input" register="true" transfer="true" optional="false" type="data" size="4222080"/>
<uses file="p2mass-atlas-ID00011s-jID00011.fits" link="output" register="false" transfer="false" optional="false" type="data" size="4164317"/>
