Question about HTML5 outline algorithm

by **zerustech** » Sat Jan 26, 2013 11:59 am

Hi Guys,

As per the W3C HTML5 spec, http://www.w3.org/html/wg/drafts/html/m ... l#outlines

When exiting a sectioning root element, if the stack is not empty, the new "current section" variable shall be set to the deepest child section of current section.

I don't quite understand the logic here, can someone give me any advice?

I understand the logic when exiting a sectioning element, because it makes sense to set the new "current section" variable to the last section of current outline.

But I just don't understand why it's necessary to find the deepest child section when existing a sectioning root.

Thanks

by **zerustech** » Sat Jan 26, 2013 1:53 pm

I guess I figured it out.

The following code snippets might explain why "deepest child" is necessary:

Code: Select all: <body id="section_0"> <h1>heading.0</h1> <article id="section_0_1"> <h1>heading.0.1</h1> <section id="section_0_1_1"> <h1>heading.0.1.1</h1> <section id="section_0_1_1_1"> <h1>heading.0.1.1.1</h1> </section> </section> <figure id="section_root_0_1_1_2"> <h1>heading.0.1.1.2</h1> </figure> <h3>substeps heading</h3> </article> </body>

Without the logic of finding "deepest child", the outline will be generated as followings, which is incorrect as per the w3c spec.

heading.0
1. heading.0.1
  1. heading.0.1.1
    1. heading.0.1.1.1
  2. Substeps heading

The correct outline should look like the followings:

heading.0
1. heading.0.1
  1. heading.0.1.1
    1. heading.0.1.1.1
      1. Substeps heading

by **JAB Creations** » Sat Jan 26, 2013 2:21 pm

Almost, never repeat h1 as it's the header for the whole page, using it twice is exactly like spamming meta-keywords.

Code: Select all: <body> <div id="section_0"> <h1>heading.0</h1> <article id="section_0_1"> <h2>heading.0.1</h2> <section id="section_0_1_1"> <h3>heading.0.1.1</h3> <section id="section_0_1_1_1"> <h4>heading.0.1.1.1</h4> </section> </section> <figure id="section_root_0_1_1_2"> <h3>heading.0.1.1.2</h3>

Question about HTML5 outline algorithm

Question about HTML5 outline algorithm

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