清空有效与否？ [英] Empty a valid or not?
问题描述
根据规格
（ http://www.w3.org/TR/html401/struct/links.html#h-12.2) ，< a>元素
需要一个结束标记。因此，当我们使用< A NAME =" foo">在HTML 2.0中
4.01，它不会验证，它会想要找到< / A>标签。
然而，当我写一个文件，其中包含< a name =" foo" />它会在XHTML 1.0中验证
。
我在这里显然遗漏了一些东西，因为这让我感到困惑。
神奇/使空元素有效吗？并且这不违反
http：// www。 w3.org/TR/xhtml1/#C_3 ？
最近我能算出来，它建议虽然标签会是
验证，我们仍然不应该这样做，以防UA无法处理空的
元素。我是在正确的轨道上吗？
如果没有，请随时纠正我。
According to the specs
(http://www.w3.org/TR/html401/struct/links.html#h-12.2), the <a> element
requires an end tag. And so, when we use <A NAME="foo"> in HTML 2.0 to
4.01, it won''t validate, it''ll want to find the </A> tag.
However, when I write a document containing, say, <a name="foo" /> it
validates in XHTML 1.0.
I''m obviously missing something here, as this confuses me somewhat. Does
the magical / make the empty a element valid? And doesn''t this violate
http://www.w3.org/TR/xhtml1/#C_3 ?
Nearest I can figure, it''s recommending that although the tag will
validate, we still shouldn''t do it in case a UA can''t handle an empty a
element. Am I on the right track?
If not, feel free to correct me.
推荐答案
Neal <是ne ***** @ spamrcn.com>写道：
Neal <ne*****@spamrcn.com> wrote:
根据规格
（ http://www.w3.org/TR/html401/struct/links.html#h-12.2) ，< a>元素
需要一个结束标记。因此，当我们使用< A NAME =" foo">在HTML 2.0到
4.01中，它不会验证，它会想要找到< / A>标签。
然而，当我写一个文件，包含，例如，< a name =" foo" />它在XHTML 1.0中验证。
我显然在这里遗漏了一些东西，因为这让我感到困惑。
魔法/使空元素有效吗？并且这不违反
http：// www。 w3.org/TR/xhtml1/#C_3 ？
最近我可以想，它建议虽然标签会验证，但我们仍然不应该如果UA无法处理空的
元素，请执行此操作。我是在正确的轨道上吗？
According to the specs
(http://www.w3.org/TR/html401/struct/links.html#h-12.2), the <a> element
requires an end tag. And so, when we use <A NAME="foo"> in HTML 2.0 to
4.01, it won''t validate, it''ll want to find the </A> tag.
However, when I write a document containing, say, <a name="foo" /> it
validates in XHTML 1.0.
I''m obviously missing something here, as this confuses me somewhat. Does
the magical / make the empty a element valid? And doesn''t this violate
http://www.w3.org/TR/xhtml1/#C_3 ?
Nearest I can figure, it''s recommending that although the tag will
validate, we still shouldn''t do it in case a UA can''t handle an empty a
element. Am I on the right track?
考虑完全放弃愚蠢的构造：
< h3 id =" s5" ;>第5节< / h3>
-
Spartanicus
Consider dropping the silly construct completely:
<h3 id="s5">Section 5</h3>
--
Spartanicus
Neal：< br>
Neal:
根据规格
（ http://www.w3.org/TR/html401/struct/links.html#h-12.2) ，< a>元素
需要一个结束标记。因此，当我们使用< A NAME =" foo">在HTML 2.0到
4.01中，它不会验证，它会想要找到< / A>标签。
但是，当我写一个文件，其中包含< a name =" foo" />它在XHTML 1.0中验证。
According to the specs
(http://www.w3.org/TR/html401/struct/links.html#h-12.2), the <a> element
requires an end tag. And so, when we use <A NAME="foo"> in HTML 2.0 to
4.01, it won''t validate, it''ll want to find the </A> tag. However, when I write a document containing, say, <a name="foo" /> it
validates in XHTML 1.0.
在HTML 2.0到4.01中，你必须写< a ...> ...< / a>"。
在XHTML中，你也可以写< a ... />。
规则是不同的。在XHTML中，这样添加了/。在
开始标记的末尾关闭元素。这在旧版HTML中是未知的。
写作"< a ... />"然而，在旧的用户代理中可能不会很好用
对XHTML一无所知。
请查看XHTML 1.0的规范。 />
-
Bertilo Wennergren< be ****** @ gmx.net> < http://www.bertilow.com>
In HTML 2.0 to 4.01 you must write "<a ...>...</a>".
In XHTML you can also write "<a ... />".
The rules are different. In XHTML such an added "/" at the end of a
start tag closes the element. That is unknown in older HTML.
Writing "<a ... />" might however not work well in old user agents that
don''t know anything about XHTML.
Do look up the specification for XHTML 1.0.
--
Bertilo Wennergren <be******@gmx.net> <http://www.bertilow.com>
Spartanicus< me@privacy.net>写道：
Spartanicus <me@privacy.net> wrote:
考虑完全放弃愚蠢的构造：
< h3 id =" s5">第5节< / h3>
Consider dropping the silly construct completely:
<h3 id="s5">Section 5</h3>
如果您需要或希望让您的文档处于工作状态，这并不傻。
Netscape 4也是如此。糟糕的浏览器不会跳转到由id
属性定义的锚点，它需要< a name>。我个人正在转向新文件中的id属性
，但有些犹豫。
-
Yucca， http://www.cs.tut.fi/~jkorpela/
关于网页创作的网页： http://www.cs.tut.fi/~jkorpela/www.html
It''s not silly if you need or wish to have your document working on
Netscape 4 too. The poor browser does not jump to anchors defined by id
attributes, it needs <a name>. Personally I''m moving to id attributes
in new documents, mostly, but with some hesitation.
--
Yucca, http://www.cs.tut.fi/~jkorpela/
Pages about Web authoring: http://www.cs.tut.fi/~jkorpela/www.html
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