How to read XML namespace attributes in RDF xml file using go

php Xiaobian Strawberry introduces you how to use Go language to read the XML namespace attributes in RDF XML files. When processing RDF XML files, we often need to read XML namespace attributes in order to correctly parse the elements and attributes in the file. The Go language provides a simple and efficient way to handle this task. By using the encoding/xml package in the standard library, we can easily read the XML namespace attributes in RDF XML files and use them for subsequent data processing and analysis. In this article, we will introduce how to use Go language to write code to implement this function, and provide some sample code for reference. Whether you are a beginner or an experienced Go language developer, this article will provide you with valuable information and practical tips. let's start!

Question content

I am trying to parse the following XML file:

<?xml version="1.0" encoding="UTF-8"?>
<rdf:RDF
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:eu="http://iec.ch/TC57/CIM100-European#"
    xmlns:md="http://iec.ch/TC57/61970-552/ModelDescription/1#"
    xmlns:cim="http://iec.ch/TC57/CIM100#" > 
  <md:FullModel rdf:about="urn:uuid:52a409c9-72d8-4b5f-bf72-9a22ec9353f7">
   ......

By using the go xml.NewDecoder(file).Decode(&model) method. I'm able to get all "FullModel" and all the following items, but I can't figure out how to get these namespace string values: xmlns:rdf, xmlns:eu...

My code: https://go.dev/play/p/qF_2er47_3R

Is there something wrong with my code?

Workaround

To generate Go structures from XML, you can use a generator such as miku/zek. There is also an online version. This code should work as expected: https://www.php.cn/link/486d016ed2f8a1de28c4b664be01f35f

Your root node is RDF and FullModel its child nodes, but what you describe FullModel is at the same level as RDF in the structure.

If you need to set a name for the root node, you can use the xml.Name structure field type. According to the documentation of encoding/xml:

Your code:

type RDF struct {
    Rdf string `xml:"rdf,attr"`
    Eu  string `xml:"eu,attr"`
    Md  string `xml:"md,attr"`
    Cim string `xml:"cim,attr"`
}

type File_model struct {
    RDF   RDF       `xml:"RDF"`
    Model FullModel `xml:"FullModel"`
}

Generated structure:

type RDF struct {
    XMLName   xml.Name `xml:"RDF"`
    Text      string   `xml:",chardata"`
    Rdf       string   `xml:"rdf,attr"`
    Eu        string   `xml:"eu,attr"`
    Md        string   `xml:"md,attr"`
    Cim       string   `xml:"cim,attr"`
    FullModel struct {
        Text                      string `xml:",chardata"`
        About                     string `xml:"about,attr"`
        ...
    } `xml:"FullModel"`
    AccumulatorLimit struct {
        Text                        string `xml:",chardata"`
        ID                          string `xml:"ID,attr"`
        ...
}

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