XML Getting Started Tutorial: A Detailed Introduction to the XHTM Module-XML/RSS Tutorial-php.cn

Home

Backend Development

XML/RSS Tutorial

XML Getting Started Tutorial: A Detailed Introduction to the XHTM Module

黄舟

Mar 11, 2017 pm 05:26 PM

XHTML is a standard recommended by the W3C, which defines an XML-compatible version of HTML. XHTML document is a valid XML document, so the writing format is stricter than HTML. XHTML is a standard recommended by the W3C that defines an XML-compatible version of HTML. An XHTML document is a valid XML document, so it is edited
XHTML is a standard recommended by the W3C that defines an XML-compatible version of HTML. XHTML document is a valid XML document, so the writing format is stricter than HTML.
XHTML is a standard recommended by W3C, which defines an XML-compatible version of HTML. XHTML document is a valid XML document, so the writing format is stricter than HTML. If you need to convert from an HTML document to an XHTML document, you need to make the following changes:

It is not allowed to omit the closing tag in XHTML, so you need to fill in the missing tags.
Elements need to be nested in the correct order.
All element and attribute names are lowercase.
Attribute values need to be added in quotation marks, such as

.
All attributes must have attribute values.
Use physical forms such as & and & lt; and so on.
Make sure the document has a single root element, preferably html.
Empty elements like

should be changed to
or

.
Comments should be changed from the form of to .
The document encoding should be UTF-8 or UTF-16, or add an XML declaration to specify the encoding method of the document.
Non-standard elements need to be removed. Such as: marguee.
Add a DOCTYPE declaration and use PUBLIC to point to one of the three DTDs of XHTML. They are Strict, Transitional and Frameset. Strict is generally used.

Strict (strict), the XHTML format recommended by W3C. Excludes some non-standard elements and attributes, such as applet and center. The declaration method is as follows:

Transitional (transitional), a less strict XHTML format, can use some non-standard elements and attributes, such as applet and bgcolor. The declaration method is as follows:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"

                     "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

Frameset (frame type), similar to the transitional DTD, allows the use of frame-related elements, such as frameset and iframe. The declaration method is as follows:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"

                     "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

The root element of the document must have the xmlns attribute, identifying the default namespace http://www.php. cn/.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"

                     "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">

The following is an example of a standard XHTML document:
Converting from HTML to XHTML is boring As for the tedious work, there is now an open source tool called tidy that can help us complete most of the work. It is a C program and the usage method is as follows:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"

                     "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">







xhtml example





...

% tidy --output-xhtml yes test.html test.xml
XHTML 1.1 divides the three DTDs of XHTML into independent modules. We may include or omit certain modules based on actual circumstances.

##Structure Module (structure module) --->%xhtml-struct.module;, contains the main elements of HTML documents, such as: html, head, title and body .
Text Module (text module)--->%xhtml-text.module;, contains the basic elements of text and its inline elements, such as: h1, h2,... ., strong, span, etc.
Hypertext Module (hyperlink module)--->%xhtml-hypertext.module;, contains elements for links, such as: a element.
List Module (list module)--->%xhtml-list.module;, contains elements for lists, such as: dl, dt, dd, ul, ol and li.
Applet Module (applet module)--->%xhtml-applet.module;, elements required by Java, such as: applet and param.
Presentation Module (presentation module)--->%xhtml-pres.module;, presentation-oriented tags: b, big, hr, I, small, sub, sup and tt.
Edit Module (Edit Module)--->%xhtml-edit.module;, used for modified elements, such as: del and ins.
Bidirectional Text Module (text direction module)--->%xhtml-bdo.module;, used to specify the direction of text reading, such as the bdo element.
Basic Forms Module (Basic Form Module)--->%xhtml-basic-form.module;, used for HTML 3.2 form elements, such as: form, input, select , option and textarea.
Forms Module (form module)--->%xhtml-form.module;, used for HTML 4.0 form elements, such as: form, input, select, option, textarea , button, fieldset, label, legend and optgroup.
Basic Tables Module (Basic Table Module)--->%xhtml-basic-table.module;, basic table elements, such as: table, caption, th, tr and td.
Table Module (table module)--->%xhtml-table.module;, table support for security functions, such as: table, caption, th, tr, td, col , colgroup, tbody, thead and tfoot.
Image Module (image module)--->%xhtml-image.module;, contains the img element.
Client-side Image Map Module (client-side image mapping module)--->%xhtml-csismap.module;, contains map and area elements and supports client-side image mapping The required attribute of the element.
Server-side-Image Map Module (server-side image mapping module)--->%xhtml-ssismap.module;, this module does not add new elements, but for the img element Added an ismap attribute.
##Object Module (object module)--->%xhtml-object.module;, used to embed executable content in web pages, such as java programs.
Param Module (parameter module)--->%xhtml-param.module;, the param element that passes parameters in the executable content of the web page.
Frames Module (frame module)--->%xhtml-frames.module;, contains the elements required to implement the framework, such as: frame, frameset and noframes.
Iframe Module (inline frame module)--->%xhtml-iframe.module;, contains the iframe element of the inline frame.
Intrinsic Events (intrinsic event module)--->%xhtml-events.module;, supports attributes of scripts such as onSubmit and onFocus.
Meta-information Module (meta-information module)--->%xhtml-meta.module;, contains meta elements.
Scripting Module (script module)--->%xhtml-script.module;, supports JavaScript and other scripts.
Stylesheet Module (style sheet module)--->%xhtml-style.module;, used to define the style element of CSS.
Link Module (link module)--->%xhtml-link.module;, specifies the link element of external files, such as style sheets, libraries, etc.
Base Modue (base module)--->%xhtml-base.module;, contains the base element, specifying the base URL referenced for parsing relative URLs.
Target Module (target module)--->%xhtml-target.module;, used to specify the target frame or the target attribute of a window in the frame.
Style Attribute Module (style attribute module)--->%xhtml-inlstyle.module;, applies CSS styles to the style attribute of a single element in the document.
Name Identification Module (name identification module)--->%xhtml-nameident.module;, the name attribute is an early version of the id attribute, and is now deprecated.
Legacy Module (traditional module)--->%xhtml-legacy.module;, deprecated elements and attributes, such as: basefont, center, fonts, strike and u element.
Ruby Module (Ruby module)--->%xhtml-ruby.module;, ruby, rbc, rtc used in East Asian texts to place a small amount of text next to the main text , rb, rt and rp elements are generally used to indicate pronunciation.

The above is the detailed content of XML Getting Started Tutorial: A Detailed Introduction to the XHTM Module. For more information, please follow other related articles on the PHP Chinese website!

Statement

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

RSS Documents: How They Deliver Your Favorite ContentApr 15, 2025 am 12:01 AM

RSS documents work by publishing content updates through XML files, and users subscribe and receive notifications through RSS readers. 1. Content publisher creates and updates RSS documents. 2. The RSS reader regularly accesses and parses XML files. 3. Users browse and read updated content. Example of usage: Subscribe to TechCrunch's RSS feed, just copy the link to the RSS reader.

Building Feeds with XML: A Hands-On Guide to RSSApr 14, 2025 am 12:17 AM

The steps to build an RSSfeed using XML are as follows: 1. Create the root element and set the version; 2. Add the channel element and its basic information; 3. Add the entry element, including the title, link and description; 4. Convert the XML structure to a string and output it. With these steps, you can create a valid RSSfeed from scratch and enhance its functionality by adding additional elements such as release date and author information.

Creating RSS Documents: A Step-by-Step TutorialApr 13, 2025 am 12:10 AM

The steps to create an RSS document are as follows: 1. Write in XML format, with the root element, including the elements. 2. Add, etc. elements to describe channel information. 3. Add elements, each representing a content entry, including,,,,,,,,,,,. 4. Optionally add and elements to enrich the content. 5. Ensure the XML format is correct, use online tools to verify, optimize performance and keep content updated.

XML's Role in RSS: The Foundation of Syndicated ContentApr 12, 2025 am 12:17 AM

The core role of XML in RSS is to provide a standardized and flexible data format. 1. The structure and markup language characteristics of XML make it suitable for data exchange and storage. 2. RSS uses XML to create a standardized format to facilitate content sharing. 3. The application of XML in RSS includes elements that define feed content, such as title and release date. 4. Advantages include standardization and scalability, and challenges include document verbose and strict syntax requirements. 5. Best practices include validating XML validity, keeping it simple, using CDATA, and regularly updating.

From XML to Readable Content: Demystifying RSS FeedsApr 11, 2025 am 12:03 AM

RSSfeedsareXMLdocumentsusedforcontentaggregationanddistribution.Totransformthemintoreadablecontent:1)ParsetheXMLusinglibrarieslikefeedparserinPython.2)HandledifferentRSSversionsandpotentialparsingerrors.3)Transformthedataintouser-friendlyformatsliket

Is There an RSS Alternative Based on JSON?Apr 10, 2025 am 09:31 AM

JSONFeed is a JSON-based RSS alternative that has its advantages simplicity and ease of use. 1) JSONFeed uses JSON format, which is easy to generate and parse. 2) It supports dynamic generation and is suitable for modern web development. 3) Using JSONFeed can improve content management efficiency and user experience.

RSS Document Tools: Building, Validating, and Publishing FeedsApr 09, 2025 am 12:10 AM

How to build, validate and publish RSSfeeds? 1. Build: Use Python scripts to generate RSSfeed, including title, link, description and release date. 2. Verification: Use FeedValidator.org or Python script to check whether RSSfeed complies with RSS2.0 standards. 3. Publish: Upload RSS files to the server, or use Flask to generate and publish RSSfeed dynamically. Through these steps, you can effectively manage and share content.

Securing Your XML/RSS Feeds: A Comprehensive Security ChecklistApr 08, 2025 am 12:06 AM

Methods to ensure the security of XML/RSSfeeds include: 1. Data verification, 2. Encrypted transmission, 3. Access control, 4. Logs and monitoring. These measures protect the integrity and confidentiality of data through network security protocols, data encryption algorithms and access control mechanisms.

See all articles