如何查询xml(无效表达式)?
xml文件的一部分:如何查询xml(无效表达式)?,xml,xml-parsing,xmlstarlet,Xml,Xml Parsing,Xmlstarlet,xml文件的一部分: <caldata chopper="on" gain_1="0" gain_2="0" gain_3="0" impedance="(0,0)"> <c0 unit="V">0.00000000e+00</c0> <c1 unit="Hz">4.00000000e-01</c1> <c2 unit="V/(nT*Hz)">1.93430000e-02</c2> <c3
<caldata chopper="on" gain_1="0" gain_2="0" gain_3="0" impedance="(0,0)">
<c0 unit="V">0.00000000e+00</c0>
<c1 unit="Hz">4.00000000e-01</c1>
<c2 unit="V/(nT*Hz)">1.93430000e-02</c2>
<c3 unit="deg">8.92260000e+01</c3>
</caldata>
<caldata chopper="on" gain_1="0" gain_2="0" gain_3="0" impedance="(0,0)">
<c0 unit="V">0.00000000e+00</c0>
<c1 unit="Hz">5.55800000e-01</c1>
<c2 unit="V/(nT*Hz)">1.93390000e-02</c2>
<c3 unit="deg">8.89710000e+01</c3>
</caldata>
<caldata chopper="on" gain_1="0" gain_2="0" gain_3="0" impedance="(0,0)">
<c0 unit="V">0.00000000e+00</c0>
<c1 unit="Hz">7.72300000e-01</c1>
<c2 unit="V/(nT*Hz)">1.93320000e-02</c2>
<c3 unit="deg">8.86030000e+01</c3>
</caldata>
0.00000000 E+00
4.00000000e-01
1.93430000e-02
8.92260000e+01
0.00000000 E+00
5.55800000e-01
1.93390000e-02
8.89710000e+01
0.00000000 E+00
7.72300000e-01
1.9332000E-02
8.86030000e+01
我想提取c2线上的数值。这是我的尝试:
xmlstarlet sel -t -v '//caldata chopper="on"[<c2 unit="V/(nT*Hz)"> ]' 263.xml
Invalid expression: //caldata chopper="on"[<c2 unit="V/(nT*Hz)"> ]
compilation error: element with-param
XSLT-with-param: Failed to compile select expression '//caldata chopper="on"[<c2 unit="V/(nT*Hz)"> ]'
xmlstarlet sel -t -v '//caldata chopper="on"[<c2 unit="V/(nT*Hz)"> ]' 263.xml
Invalid expression: //caldata chopper="on"[<c2 unit="V/(nT*Hz)"> ]
compilation error: element with-param
XSLT-with-param: Failed to compile select expression '//caldata chopper="on"[<c2 unit="V/(nT*Hz)"> ]'
xmlstarlet sel-t-v'//caldata chopper=“on”[]263.xml
无效的表达式://caldata chopper=“on”[]
编译错误:元素带有param
带参数的XSLT:未能编译选择表达式“//caldata chopper=”on“[]”
xmlstarlet sel-t-v'//caldata chopper=“on”[]263.xml
无效的表达式://caldata chopper=“on”[]
编译错误:元素带有param
带参数的XSLT:未能编译选择表达式“//caldata chopper=”on“[]”
我应该换什么?
xmlstarlet
是否适合此任务?xmlstarlet非常适合此任务。尝试:
xmlstarlet sel -t -v '//caldata[@chopper="on"]/c2[@unit="V/(nT*Hz)"]' 263.xml
结果:
1.93430000e-021.93390000e-02
1.9332000E-02
xmlstarlet非常适合此任务。尝试:
xmlstarlet sel -t -v '//caldata[@chopper="on"]/c2[@unit="V/(nT*Hz)"]' 263.xml
结果:
1.93430000e-021.93390000e-02
1.9332000E-02