如何使用XMLLINT和BASH解析XML文件中的名称空间

下面是一个用于跟踪库存的Adobe XML swidtag的示例。我需要在bash中使用xmllint解析出相关信息，然后将其输出到新的文本文件中。

例如，我想解析以下内容

swid:entitlement_required_indicator
swid:product_title
swid:product_version
swid:name
swid:numeric
swid:major
swid:minor
swid:build
swid:review

我尝试使用此名称，但它不会让我读取名称空间

xmllint --xpath '//swid:product_version/swid:name/text()' file.xml

我也尝试过

xmllint --xpath "//*[local-name1()='product_version']/*[local-name2()='name']/text()" file.xml

但是得到了这些错误

xmlXPathCompOpEval: function local-nameame1 not found
XPath error : Unregistered function
XPath error : Stack usage errror
XPath evaluation failure

Creative Suite 5的示例标记文件以下示例适用于序列化为Creative Suite 5 Master Collection（Suite）的Adobe Photoshop CS5

<?xml version="1.0" encoding="utf-8"?>
<swid:software_identification_tag xsi:schemaLocation="http://standards.iso.org/iso/19770/-2/2008/schema.xsd software_identification_tag.xsd" 
     xmlns:swid="http://standards.iso.org/iso/19770/-2/2008/schema.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

<!--Mandatory Identity elements -->
<swid:entitlement_required_indicator>true</swid:entitlement_required_indicator>
<swid:product_title>Acrobat XI Pro</swid:product_title>
<swid:product_version>
    <swid:name>1.0</swid:name>
    <swid:numeric>
        <swid:major>1</swid:major>
        <swid:minor>0</swid:minor>
        <swid:build>0</swid:build>
        <swid:review>0</swid:review>
    </swid:numeric>
</swid:product_version>
<swid:software_creator>
    <swid:name>Adobe Systems Incorporated</swid:name>
    <swid:regid>regid.1986-12.com.adobe</swid:regid>
</swid:software_creator>
<swid:software_licensor>
    <swid:name>Adobe Systems Incorporated</swid:name>
    <swid:regid>regid.1986-12.com.adobe</swid:regid>
</swid:software_licensor>
<swid:software_id>
    <swid:unique_id>CreativeCloud-CS6-Mac-GM-MUL</swid:unique_id>
    <swid:tag_creator_regid>regid.1986-12.com.adobe</swid:tag_creator_regid>
</swid:software_id>

<swid:tag_creator>
    <swid:name>Adobe Systems Incorporated</swid:name>
    <swid:regid>regid.1986-12.com.adobe</swid:regid>
</swid:tag_creator>
<!--Optional Identity elements -->
<swid:license_linkage>
    <swid:activation_status>activated</swid:activation_status>
    <swid:channel_type>SUBSCRIPTION</swid:channel_type>
    <swid:customer_type>RETAIL</swid:customer_type>
</swid:license_linkage>
<swid:serial_number>909702426602037824854600</swid:serial_number>
</swid:software_identification_tag>