At 06:24 PM 2/5/03 +0000, [EMAIL PROTECTED] wrote:
The advantages of using P14 tags (...equals lang IDs mark-up) is that runs of text could be tagged *in a standard fashion* and preserved in plain-text.
The minute you have scoped tagging, you are no longer using plain text.
The P14 tags are no different than HTML markup in that regard, however, unlike HTML markup they can be filtered out by a process that does not implement them. (In order to filter out HTML, you need to know the HTML syntax rules. In order to filter out P14 tags you only need to know their code point range.) Variation selectors also can be ignored based on their code point values, but unlike p14 tags, they don't become invalid when text is cut&paste from the middle of a string. If 'unaware' applications treat them like unknown combining marks and keep them with the base character like they would any other combining mark during editing, then variation selectors have a good chance surviving in plain text. P14 tags do not. Unicode 4.0 will be quite specific: P14 tags are "reserved for use with particular protocols requiring their use" is what the text will say more or less. A./
