Make LesML:split a function

[LesML] / README.markdown

diff --git a/README.markdown b/README.markdown
index 7df7fdecb1a948fff11ff43c224747226f330884..99ff8badb8b838699e8e8ba0928287fbd636050c 100644 (file)
--- a/README.markdown
+++ b/README.markdown
@@ -1,5 +1,5 @@
 <!--
 <!--

-SPDX-FileCopyrightText: 2024 Lady <https://www.ladys.computer/about/#lady>
+SPDX-FileCopyrightText: 2024, 2025 Lady <https://www.ladys.computer/about/#lady>

 SPDX-License-Identifier: CC0-1.0
 -->
 # 💄📝 Les·M·L
 SPDX-License-Identifier: CC0-1.0
 -->
 # 💄📝 Les·M·L


@@ -43,9 +43,25 @@ Following the shebang line, document metadata may be provided in the
 The body of the document begins after the last line which begins with
   the string `%%`, or after the shebang line if none exists.
 
 The body of the document begins after the last line which begins with
   the string `%%`, or after the shebang line if none exists.
 

+Multiple documents can be catenated into a single file; a new document
+  is begun on any line which starts with `#!lesml` or `##`.
+Documents in the later case inherit the latest preceding `#!lesml`
+  declaration.
+`##` may be followed by other text; this is treated as an interdocument
+  comment.
+

 Documents are broken into paragraphs by blank lines.
 Empty paragraphs are ignored.
 Documents are broken into paragraphs by blank lines.
 Empty paragraphs are ignored.

-Non·empty paragraphs are classified as follows :⁠—
+
+If every line in the paragraph begins with (optional white·space
+  followed by) `»` it is quoted (`<html:blockquote>`); if every line
+  begins with `]` it is bracketed.
+The lines, minus this leading, are then re‐analysed.
+Bracketed paragraphs which end quotes are treated as captions
+  (`<html:figcaption>`); otherwise, they are footers (`<html:footer>`).
+
+Non·empty paragraphs (which, to be clear, may still result in empty
+  `<html:p>` elements) are classified as follows :⁠—

 
 - If the paragraph consists of only the following section‐break
     characters, plus any amount of white·space, then it is
 
 - If the paragraph consists of only the following section‐break
     characters, plus any amount of white·space, then it is


@@ -55,7 +71,6 @@ Non·empty paragraphs are classified as follows :⁠—
 
   | Character | Codepoint | Unicode Name |
   | --------- | --------- | ------------ |
 
   | Character | Codepoint | Unicode Name |
   | --------- | --------- | ------------ |

-  | `#` | `U+0023` | `NUMBER SIGN` |

   | `*` | `U+002A` | `ASTERISK` |
   | `-` | `U+002D` | `HYPHEN-MINUS` |
   | `.` | `U+002E` | `FULL STOP` |
   | `*` | `U+002A` | `ASTERISK` |
   | `-` | `U+002D` | `HYPHEN-MINUS` |
   | `.` | `U+002E` | `FULL STOP` |


@@ -92,16 +107,18 @@ Non·empty paragraphs are classified as follows :⁠—
   | `＿` | `U+FF3F` | `FULLWIDTH LOW LINE` |
   | `～` | `U+FF5E` | `FULLWIDTH TILDE` |
 
   | `＿` | `U+FF3F` | `FULLWIDTH LOW LINE` |
   | `～` | `U+FF5E` | `FULLWIDTH TILDE` |
 

-- If every line in the paragraph begins with at least one space, then
-    it is considered to be a quoted paragraph (`<html:blockquote>`).
-  There is only one level of paragraph quoting; quoted paragraphs may
-    not be quoted again.
+- If every line in the paragraph begins with zero or more white·space
+    characters followed by `|`, it is a “preformatted” paragraph and
+    white·space is not collapsed (`<html:pre>`).

 
 

-- Otherwise, the paragraph is unquoted.
+- Otherwise, the paragraph is ordinary.

 
 

-After this classification, each quoted or unquoted paragraph is further
-  classified by type based on its first character (which is must be
-   followed by white·space to be recognized) :⁠—
+After this classification, each ordinary paragraph is further
+  classified by type based on its first character (which must be
+  followed by white·space or a pilcrow, or else be the only thing on
+  the line) :⁠—
+
+- If the paragraph is preformatted, it is an ordinary paragraph.

 
 - If the paragraph begins with `⁌`, it is a chapter heading
     (`<html:h1>`).
 
 - If the paragraph begins with `⁌`, it is a chapter heading
     (`<html:h1>`).


@@ -116,61 +133,112 @@ After this classification, each quoted or unquoted paragraph is further
     (`<html:h4>`).
 
 - If the paragraph begins with `•` or `🔢`, it is a primary unordered
     (`<html:h4>`).
 
 - If the paragraph begins with `•` or `🔢`, it is a primary unordered

-    or ordered list item (`<html:li class="unordered" data-level="1">`
-    or `<html:li class="ordered" data-level="1">`).
+    or ordered list item (`<html:li class="unordered" aria-level="1">`
+    or `<html:li class="ordered" aria-level="1">`).

 
 - If the paragraph begins with `◦` or `🔠`, it is a secondary unordered
 
 - If the paragraph begins with `◦` or `🔠`, it is a secondary unordered

-    or ordered list item (`<html:li class="unordered" data-level="2">`
-    or `<html:li class="ordered" data-level="2">`).
+    or ordered list item (`<html:li class="unordered" aria-level="2">`
+    or `<html:li class="ordered" aria-level="2">`).

   Secondary list items are considered to be nested inside of primary
     list items which precede them.
 
 - If the paragraph begins with `▪` or `🔡`, it is a tertiary unordered
   Secondary list items are considered to be nested inside of primary
     list items which precede them.
 
 - If the paragraph begins with `▪` or `🔡`, it is a tertiary unordered

-    or ordered list item (`<html:li class="unordered" data-level="3">`
-    or `<html:li class="ordered" data-level="3">`).
+    or ordered list item (`<html:li class="unordered" aria-level="3">`
+    or `<html:li class="ordered" aria-level="3">`).

   Tertiary list items are considered to be nested inside of primary
     and secondary list items which precede them.
 
 - If the paragraph begins with `⁃` or `🔣`, it is a quaternary
     unordered or ordered list item
   Tertiary list items are considered to be nested inside of primary
     and secondary list items which precede them.
 
 - If the paragraph begins with `⁃` or `🔣`, it is a quaternary
     unordered or ordered list item

-    (`<html:li class="unordered" data-level="4">` or
-    `<html:li class="ordered" data-level="4">`).
+    (`<html:li class="unordered" aria-level="4">` or
+    `<html:li class="ordered" aria-level="4">`).

   Quaternary list items are considered to be nested inside of primary,
     secondary, and tertiary list items which precede them.
 
 - If the paragraph begins with `※`, it is an ordinary note
   Quaternary list items are considered to be nested inside of primary,
     secondary, and tertiary list items which precede them.
 
 - If the paragraph begins with `※`, it is an ordinary note

-    (`<html:div role="note" class="note">`).
+    (`<html:section role="note" class="note">`).

 
 - If the paragraph begins with `☡`, it is a cautionary note
 
 - If the paragraph begins with `☡`, it is a cautionary note

-    (`<html:div role="note" class="caution">`).
-
-- If the paragraph begins with `🛈`, it is an informative note
-    (`<html:div role="note" class="info">`).
+    (`<html:section role="note" class="caution">`).

 
 - If the paragraph begins with `⯑`, it is a questioning note
 
 - If the paragraph begins with `⯑`, it is a questioning note

-    (`<html:div role="note" class="query">`).
-
-- If the paragraph begins with `⚠︎`, it is a warning note
-    (`<html:div role="note" class="warn">`).
-
-- If the paragraph begins with `⋯`, it is a continuation paragraph
-    (`<html:div class="continuation">`).
-  Continuation paragraphs may be used to continue a preceding list item
-    or quote.
-  Note, however, that an unquoted paragraph cannot continue a quoted
-    one, or vice·versa.
+    (`<html:section role="note" class="query">`).
+
+- If the paragraph begins with `@`, it is an abstract
+    (`<html:section role="doc-abstract">`).
+
+- If the paragraph begins with `🛈`, it is a (informative) tip
+    (`<html:section role="doc-tip">`).
+
+- If the paragraph begins with `⚠︎`, it is a (warning) notice
+    (`<html:section role="doc-notice">`).
+
+- If the paragraph begins with `^`, it is a footnote
+    (`<html:li class="ordered footnote" aria-level="1">`).
+  Footnotes are ignored unless their first paragraph has an i·d
+    (specified with `¶`) which is referenced by one or more footnote
+    references.
+  Footnotes are treated as level 1 ordered list items, so they can
+    contain nested lists.
+
+  Footnotes are removed from the normal document flow and placed in a
+    footer (`<html:section role="doc-endnotes">`) in order of first
+    reference.
+  It is recommended that the i·d¦s you choose are kept stable, so that
+    links to footnotes do not break.
+
+- If the paragraph begins with `#`, it is a comment.
+  Comments produce X·M·L comment nodes and can be used to break up list
+    items into separate lists.
+
+- If the paragraph begins with `⋯`, it is a continuation paragraph.
+  Continuation paragraphs may be used to continue a preceding note,
+    footnote, or list item.
+  If there is no such preceding note, footnote, or list item, they will
+    attach to adjacent heading elements to form heading groups
+    (`<html:hgroup>`).
+  Otherwise, they will be treated as ordinary paragraphs.

 
 - Otherwise, it is an ordinary paragraph.
 
 
 - Otherwise, it is an ordinary paragraph.
 

-Following this sigil (if any, including trailing white·space) there may
-  be a `¶` followed by zero or more non·white·space characters.
+Following this sigil (if any) there may be a `¶` followed by zero or
+  more non·white·space characters.

 The characters following the `¶` give the identifier for the paragraph,
   which is expected to be unique within a document.
 The characters following the `¶` give the identifier for the paragraph,
   which is expected to be unique within a document.

+This may be suffixed with a language tag beginning with `@` and
+  terminated with `$`.
+
+When a paragraph produces an `<html:p>` element “wrapped in” another
+  kind of element (e·g, a blockquote, section, or list item), the
+  identifier and language of the first paragraph are applied to the
+  wrapping element.
+If the first paragraph has no other contents, it is deleted.
+To apply the identifier or language to the `<html:p>` element itself,
+  and not its wrapper, one can simply make the first paragraph empty
+  (using a literal `¶` with no other contents).
+This paragraph will be dropped, but the following paragraphs will still
+  be processed as non·initial.

 
 The remaining characters in a paragraph form its contents.
 Markup within paragraphs is delimited with·out exception by pairs of
   characters, with the following precedence :⁠—
 
 
 The remaining characters in a paragraph form its contents.
 Markup within paragraphs is delimited with·out exception by pairs of
   characters, with the following precedence :⁠—
 

+- The characters `⌦` and `⌫` indicate inline comments.
+  A single character `⌧` may be used to indicate an “empty” comment
+    (consisting of `U+034F COMBINING GRAPHEME JOINER` for X·M·L
+    compatibility).
+
+- The characters `{@` and `"}` indicate attribute specifications.
+  The attribute specification must contain at least one `="` which
+    separates the key of the attribute from the value.
+  Attributes attach to the previous element or text node, with
+    white·space‐only text nodes after elements ignored; if there is no
+    such previous element or text node, an empty text node is used
+    instead.
+  Multiple attributes can be given in sequence using multiple
+    specifications.
+  Text nodes with attributes are wrapped in `<html:span>`.
+

 - The characters `{🔗` and `>}` indicate a hyperlink to a U·R·L
     (`<html:a>`).
   The hyperlink must contain at least one `<`; the content before the
 - The characters `{🔗` and `>}` indicate a hyperlink to a U·R·L
     (`<html:a>`).
   The hyperlink must contain at least one `<`; the content before the


@@ -188,44 +256,50 @@ Markup within paragraphs is delimited with·out exception by pairs of
 - The characters `⸨` and `⸩` indicate parenthetical content
     (`<html:small>`).
 
 - The characters `⸨` and `⸩` indicate parenthetical content
     (`<html:small>`).
 

-- The characters `☞︎` and `☜︎` indicate strong importance
-    (`<html:strong>`).
-
-- The characters `⹐` and `⹑` indicate emphasis (`<html:em>`).
+- The characters `` ` `` and `´` indicate code (`<html:code>`).

 
 - The characters `⟪` and `⟫` indicate titles (`<html:cite>`).
 
 
 - The characters `⟪` and `⟫` indicate titles (`<html:cite>`).
 

+- The characters `⸶` and `⸷` indicate names (`<html:u class="name">`).
+

 - The characters `⟨` and `⟩` indicate offset text (`<html:i>`).
 - The characters `⟨` and `⟩` indicate offset text (`<html:i>`).

-  This may be followed by a `@`, a language tag, and a `$` to provide
-    the language of the text.

 
 - The characters `⦃` and `⦄` indicate keyword highlighting
     (`<html:b>`).
 
 
 - The characters `⦃` and `⦄` indicate keyword highlighting
     (`<html:b>`).
 

-- The characters `` ` `` and `´` indicate code (`<html:code>`).
+- The characters `☞︎` and `☜︎` indicate strong importance
+    (`<html:strong>`).
+
+- The characters `⹐` and `⹑` indicate emphasis (`<html:em>`).
+
+- The characters `^` and `.` indicate a footnote reference
+    (`<html:a role="doc-noteref">`).
+  The characters between these sigils must match the i·d of the first
+    paragraph of some footnote in the same document.

 
 Once the tree is built as above, it is remediated into its final form
   by the following steps :⁠—
 
 
 Once the tree is built as above, it is remediated into its final form
   by the following steps :⁠—
 

-- Successive quoted paragraphs are joined into one quote.
-  If the final quoted paragraph is an ordinary paragraph which begins
-    with `—` and a space, the quote is wrapped in a `<html:figure>`
-    and the final paragraph becomes its `<html:figcaption>`.
-

 - Continuation paragraphs are joined with the preceding list items or
 - Continuation paragraphs are joined with the preceding list items or

-    quotes.
+    sections.

 
 - List items of a higher level are nested in preceding list items, when
     present.
 
 - List items of a higher level are nested in preceding list items, when
     present.

+  List items of a level greater than 1 can also be nested in preceding
+    sections (notes, abstracts, ⁊·c…).

 
 - Successive list items of the same level and class are joined into
     a single list.
 
 
 - Successive list items of the same level and class are joined into
     a single list.
 

+- Linebreaks in preformatted paragraphs are replaced with `<html:br>`.
+

 Finally, any character can be escaped by instead providing its Unicode
 Finally, any character can be escaped by instead providing its Unicode

-  codepoint in the form `<U+NNNN>`, where `NNNN` is one or more
+  codepoint in the form `{U+NNNN}`, where `NNNN` is one or more

   hexadecimal digits.
 Multiple codepoints may be provided separated by periods, as in
   hexadecimal digits.
 Multiple codepoints may be provided separated by periods, as in

-  `<U+WWWW.ZZZZ>`
+  `{U+WWWW.ZZZZ}`.
+Due to limitations in X·S·L·T, characters cannot be escaped in
+  attributes (including link targets).

 
 ## Usage
 
 
 ## Usage