library/cpp/xml/document/README


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42

A wrapper around the DOM interface of libxml2. 
 
The standard way to use it is as follows: 
 
    #include <library/cpp/xml/document/xml-document.h>
    ... 
 
    // open a document 
    NXml::TDocument xml("filename.xml"); 
 
    // get a nodeset from an XPath query 
    NXml::TConstNodes nodes = xml.Root().Nodes("xpath/expression/here"); 
 
    // iterate over the nodeset 
    for (size_t i = 0; i < nodes.size(); ++i) { 
        using namespace NXml;
        TConstNode& node = nodes[i]; 
        // query node
        TString name = node.Name();
        TString lang = node.Attr<TString>("lang");
        TString text = node.Value<TString>();
        TConstNode child = node.GetFirstChild("");
        // edit node
        TNode node = child.ConstCast();
        node.DelAttr("id");
        node.SetAttr("x", 2);
        node.SetValue(5);
        node.AddText(" apples");
    } 
 
    // edit documents with copy-paste
    NXml::TDocument xml2("<xpath><node/></xpath>", NXml::TDocument::String);
    NXml::TNode place = xml2.Root().Node("xpath/node");
    // copy node's subtree from one document to another
    place.AddChild(xml.Root());
    // save (render) single element
    TString modifiedNode = place.ToString();
    // save whole document with optional encoding
    TString modifiedDoc  = xml2.ToString("ISO-8559-1");


See xml-document_ut.cpp for more examples.