在shell脚本中的另一个标记的同一级别提取标记

Say i have the following XML:

说我有以下XML：

<app-deployment>
    <name>gr1</name>
    <target>AdminServer</target>
    <module-type>ear</module-type>
    <source-path>/u01/app/wls1035_homes/wls1035_9999/grc864</source-path>
    <security-dd-model>DDOnly</security-dd-model>
    <staging-mode>stage</staging-mode>
</app-deployment>
<app-deployment>
    <name>gr2</name>
    <target>AdminServer</target>
    <module-type>ear</module-type>
    <source-path>/u01/app/wls1035_homes/wls1035_9999/grc864</source-path>
    <security-dd-model>DDOnly</security-dd-model>
    <staging-mode>nostage</staging-mode>
</app-deployment>  
<app-deployment>
    <name>gr3</name>
    <target>AdminServer</target>
    <module-type>ear</module-type>
    <source-path>/u01/app/wls1035_homes/wls1035_9999/grc864</source-path>
    <security-dd-model>DDOnly</security-dd-model>
</app-deployment>
<ap