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[REBOL] Re: Tags, anyone?

From: brett:codeconscious at: 16-Apr-2002 10:07

Hi Ammon, I know there is the BUILD-TAG function. And that
>> series? <test>
== true So you can do:
>> find <test href="blah"> 'href
== <href="blah"> Also note that because tag is a series it is easy to get caught with rejoin when forming a string from tags:
>> rejoin [<test> "color"]
== <testcolor> So my habit is to use join where the first argument dictates the datatype of my result:
>> join {} [<test> "color" </test>]
== "<test>color</test>" You can load/markup...
>> load/markup {<test>some text </test>}
== [<test> "some text " </test>] ...and use tag in parse: parse load/markup {<test>some text </test>} [ tag! string! tag! ] Ages ago I wrote some stuff to play with markup and change tags into blocks using load/markup and the fact that tags are series: Tag-tool.r gives the import-tag function:
>> import-tag <body bgcolor=white>
== [body bgcolor "white"] Which can be used as input to build-tag:
>> build-tag [body bgcolor "white"]
== <body bgcolor="white"> markup-tools.r gives the load-markup function which produce a "flat" representation of the markup where tags are made into blocks.
>> load-markup {<text>some <b>text</b></text>}
== [[text] "some " [b] "text" [/b] [/text]] There is also form-markup which converts this representation back into a string:
>> form-markup [ [p] "paragraph 1" [p] "paragraph2" ]
== "<p>paragraph 1<p>paragraph2" I did this to give a basic markup manipulation facility: m: load-markup {<body bgcolor="white">some <b>text</b></body>} change next find first m 'bgcolor "blue" form-markup m == {<body bgcolor="blue">some <b>text</b></body>} For XML stuff there is Gavin's great work: Regards, Brett.