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Module `std.xml`

Warning: This module is considered out-dated and not up to Phobos' current standards. It will remain until we have a suitable replacement, but be aware that it will not remain long term.

Classes and functions for creating and parsing XML

The basic architecture of this module is that there are standalone functions, classes for constructing an XML document from scratch (Tag, Element and Document), and also classes for parsing a pre-existing XML file (ElementParser and DocumentParser). The parsing classes may be used to build a Document, but that is not their primary purpose. The handling capabilities of DocumentParser and ElementParser are sufficiently customizable that you can make them do pretty much whatever you want.

Example

This example creates a DOM (Document Object Model) tree from an XML file.

import std.xml;
import std.stdio;
import std.string;
import std.file;

// books.xml is used in various samples throughout the Microsoft XML Core
// Services (MSXML) SDK.
//
// See http://msdn2.microsoft.com/en-us/library/ms762271(VS.85).aspx

void main()
{
    string s = cast(string) read("books.xml");

    // Check for well-formedness
    check(s);

    // Make a DOM tree
    auto doc = new Document(s);

    // Plain-print it
    writeln(doc);
}

Example

This example does much the same thing, except that the file is deconstructed and reconstructed by hand. This is more work, but the techniques involved offer vastly more power.

import std.xml;
import std.stdio;
import std.string;

struct Book
{
    string id;
    string author;
    string title;
    string genre;
    string price;
    string pubDate;
    string description;
}

void main()
{
    string s = cast(string) read("books.xml");

    // Check for well-formedness
    check(s);

    // Take it apart
    Book[] books;

    auto xml = new DocumentParser(s);
    xml.onStartTag["book"] = (ElementParser xml)
    {
        Book book;
        book.id = xml.tag.attr["id"];

        xml.onEndTag["author"]       = (in Element e) { book.author      = e.text(); };
        xml.onEndTag["title"]        = (in Element e) { book.title       = e.text(); };
        xml.onEndTag["genre"]        = (in Element e) { book.genre       = e.text(); };
        xml.onEndTag["price"]        = (in Element e) { book.price       = e.text(); };
        xml.onEndTag["publish-date"] = (in Element e) { book.pubDate     = e.text(); };
        xml.onEndTag["description"]  = (in Element e) { book.description = e.text(); };

        xml.parse();

        books ~= book;
    };
    xml.parse();

    // Put it back together again;
    auto doc = new Document(new Tag("catalog"));
    foreach (book;books)
    {
        auto element = new Element("book");
        element.tag.attr["id"] = book.id;

        element ~= new Element("author",      book.author);
        element ~= new Element("title",       book.title);
        element ~= new Element("genre",       book.genre);
        element ~= new Element("price",       book.price);
        element ~= new Element("publish-date",book.pubDate);
        element ~= new Element("description", book.description);

        doc ~= element;
    }

    // Pretty-print it
    writefln(join(doc.pretty(3),"\n"));
}

Functions

Name	Description
`check(s)`	Check an entire XML document for well-formedness
`decode(s, mode)`	Decodes a string by unescaping all predefined XML entities.
`encode(s)`	Encodes a string by replacing all characters which need to be escaped with appropriate predefined XML entities.
`isBaseChar(c)`	Returns true if the character is a base character according to the XML standard
`isChar(c)`	Returns true if the character is a character according to the XML standard
`isCombiningChar(c)`	Returns true if the character is a combining character according to the XML standard
`isDigit(c)`	Returns true if the character is a digit according to the XML standard
`isExtender(c)`	Returns true if the character is an extender according to the XML standard
`isIdeographic(c)`	Returns true if the character is an ideographic character according to the XML standard
`isLetter(c)`	Returns true if the character is a letter according to the XML standard
`isSpace(c)`	Returns true if the character is whitespace according to the XML standard

Classes

Name	Description
`CData`	Class representing a Character Data section
`CDataException`	Thrown during CData constructor
`CheckException`	Thrown during check()
`Comment`	Class representing a comment
`CommentException`	Thrown during Comment constructor
`DecodeException`	Thrown during decode()
`Document`	Class representing an XML document.
`DocumentParser`	Class for parsing an XML Document.
`Element`	Class representing an XML element.
`ElementParser`	Class for parsing an XML element.
`InvalidTypeException`	Thrown if comparing with wrong type
`Item`	Abstract base class for XML items
`PIException`	Thrown during ProcessingInstruction constructor
`ProcessingInstruction`	Class representing a Processing Instruction section
`Tag`	Class representing an XML tag.
`TagException`	Thrown when parsing for Tags
`Text`	Class representing a text (aka Parsed Character Data) section
`TextException`	Thrown during Text constructor
`XIException`	Thrown during XMLInstruction constructor
`XMLException`	The base class for exceptions thrown by this module
`XMLInstruction`	Class representing an XML Instruction section

Enums

Name	Description
`DecodeMode`	Mode to use for decoding.
`TagType`	Tag types.

Authors

Janice Caron

License

Boost License 1.0.

API Documentation

Module std.xml

Example

Example

Functions

Classes

Enums

Authors

License

Module `std.xml`