[英]lxml xsi:schemaLocation namespace URI validation issue
I'm trying to use lxml.etree
to reproduce the CDA example found in the CDA QuickStart Guide found here . 我正在尝试使用lxml.etree
来重现此处找到的CDA快速入门指南中的CDA示例。
In particular, I'm running into issues with namespaces trying to recreate this element. 特别是,我遇到了尝试重新创建此元素的命名空间问题。
<ClinicalDocument xmlns="urn:hl7-org:v3" xmlns:mif="urn:hl7-org:v3/mif"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="urn:hl7-org:v3 CDA.xsd">
The code I'm using is as follows 我正在使用的代码如下
root = etree.Element('ClinicalDocument',
nsmap={None: 'urn:hl7-org:v3',
'mif': 'urn:hl7-org:v3/mif',
'xsi': 'http://www.w3.org/2001/XMLSchema-instance',
'{http://www.w3.org/2001/XMLSchema-instance}schemaLocation': 'urn:hl7-org:v3 CDA.xsd'})
The problem is with the schemaLocation
entry in nsmap
. 问题在于nsmap
的schemaLocation
条目。 lxml
appears to be trying to validate the value and gives the error lxml
似乎试图验证该值并给出错误
ValueError: Invalid namespace URI u'urn:hl7-org:v3 CDA.xsd'
Am I specifying the schemaLocation
value incorrectly? 我是否错误地指定了schemaLocation
值? Is there a way to force lxml
to accept any string value? 有没有办法强制lxml
接受任何字符串值? Or is the value in the example simply intended to be a placeholder that I am supposed to replace with something else? 或者示例中的值是否只是一个占位符,我应该用其他东西替换?
nsmap
is a mapping of prefixes to namespace URIs. nsmap
是前缀到名称空间URI的映射。 urn:hl7-org:v3 CDA.xsd
is a valid value for the xsi:schemaLocation
attribute, but it is not a valid namespace URI. urn:hl7-org:v3 CDA.xsd
是xsi:schemaLocation
属性的有效值,但它不是有效的命名空间URI。
The solution to a similar question, How to include the namespaces into a xml file using lxmf? 解决类似问题的方法, 如何使用lxmf将命名空间包含到xml文件中? , works here too. ,也在这里工作。 Use QName
to create the xsi:schemaLocation
attribute. 使用QName
创建xsi:schemaLocation
属性。
from lxml import etree
attr_qname = etree.QName("http://www.w3.org/2001/XMLSchema-instance", "schemaLocation")
root = etree.Element('ClinicalDocument',
{attr_qname: 'urn:hl7-org:v3 CDA.xsd'},
nsmap={None: 'urn:hl7-org:v3',
'mif': 'urn:hl7-org:v3/mif',
'xsi': 'http://www.w3.org/2001/XMLSchema-instance',
})
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