Update readme documentation

[Shushe] / README.markdown

diff --git a/README.markdown b/README.markdown
index 13cb1d66fbc34cdaed3e28bd2e20a77b92a41cf9..28b8b4684366a80c55be6a9ff55065dd640b9ed5 100644 (file)
--- a/README.markdown
+++ b/README.markdown
@@ -124,9 +124,21 @@ The following additional variables can be used to control the behaviour
 
 - **`BUILDDIR`:**
   The location of the (temporary) build directory (default: `build`).
+  `make clean` will delete this, and it is recommended that it not be
+    used for programs aside from ⛩️📰 书社.
 
 - **`DESTDIR`:**
   The location of directory to output files to (default: `public`).
+  `make install` will overwrite files in this directory which
+    correspond to those in `SRCDIR`.
+  It *will not* touch other files, including those generated from files
+    in `SRCDIR` which have since been deleted.
+
+  Files are first compiled to `$(BUILDDIR)/public` before they are
+    copied to `DESTDIR`, so this folder is relatively quick and
+    inexpensive to re·create.
+  It’s reasonable to simply delete it before every `make install` to
+    ensure stale content is removed.
 
 - **`THISDIR`:**
   The location of the ⛩️📰 书社 `GNUmakefile`.
@@ -186,18 +198,11 @@ Text formats with associated X·S·L·T parsers are wrapped in a H·T·M·L
 Source files whose media type does not have an associated X·S·L·T
   parser are considered “assets” and will not be transformed.
 
-For compatibility with this program, source filenames should conform to
-  the following rules :⁠—
-
-- They should not start with a hyphen‐minus.
-  This is to prevent confusion between filenames and options on the
-    commandline.
-
-- They should not contain spaces, colons, percent signs, backticks,
-    question marks, hashes, or backslashes.
-
-In general, filenames should be such that they do not require
-  percent‐encoding in the path component of an i·r·i.
+For compatibility with this program, source filenames should not
+  contain Ascii whitespace or any of the following Ascii characters:
+  ``!"#$%&()-:<>?\^`{|}``.
+These characters are either invalid in u·r·i’s or conflict with aspects
+  of the Make or commandline syntax.
 
 ## Parsers
 
@@ -207,14 +212,20 @@ Parsers are used to convert plaintext files into X·M·L trees, as well
 ⛩️📰 书社 comes with some parsers; namely :⁠—
 
 - **`parsers/plain.xslt`:**
-  Wraps `text/plain` contents in a `<html:pre>` element.
+  Wraps `text/plain` contents in a `<html:pre class="plain">` element.
+
+- **`parsers/record-jar.xslt`:**
+  Converts `text/record-jar` contents into a
+    `<html:div class="record-jar">` of `<html:dl>` elements (one for
+    each record).
 
 - **`parsers/tsv.xslt`:**
-  Converts `text/tab-separated-values` contents into an `<html:table>`
-    element.
+  Converts `text/tab-separated-values` contents into an
+    `<html:table class="tsv">` element.
 
-New ⛩️📰 书社 parsers should have a `<xslt:template>` element with no
-  `@name` or `@mode` and whose `@match` attribute…
+New ⛩️📰 书社 parsers which target plaintext formats should have an
+  `<xslt:template>` element with no `@name` or `@mode` and whose
+  `@match` attribute…
 
 - Starts with an appropriately‐namespaced qualified name for a
     `<html:script>` element.
@@ -250,9 +261,16 @@ Alternatively, you can set the `@书社:supported-media-types` attribute
   on the root element of the parser to override media type support
   detection.
 
-It is **strongly recommended** that all templates in parsers other than
-  those described above be namespaced (by `@name` or `@mode`), to avoid
-  conflicts between templates in multiple parsers.
+Parsers can also target specific dialects of X·M·L, in which case they
+  operate on the same basic principles as transforms (described below).
+The major distinction between X·M·L parsers and transforms is where in
+  the process the transformation happens:
+Parsers are applied *prior* to embedding (and can be used to generate
+  embeds); transforms are applied *after*.
+
+It is **strongly recommended** that auxillary templates in parsers be
+  namespaced (by `@name` or `@mode`) whenever possible, to avoid
+  conflicts between parsers.
 
 ## Embedding
 
@@ -283,6 +301,14 @@ Transforms are used to convert X·M·L files into their final output,
   after all necessary parsing and embedding has taken place.
 ⛩️📰 书社 comes with some transforms; namely :⁠—
 
+- **`transforms/attributes.xslt`:**
+  Applies transforms to the children of any `<书社:apply-attributes>`
+    elements, and then applies the attributes of the
+    `<书社:apply-attributes>` to each result child, replacing the
+    element with the result.
+  This is useful in combination with image embeds to apply alt‐text to
+    the resulting `<html:img>`.
+
 - **`transforms/asset.xslt`:**
   Converts `<html:object>` elements which correspond to recognized
     media types into the appropriate H·T·M·L elements, and deletes
@@ -291,7 +317,7 @@ Transforms are used to convert X·M·L files into their final output,
 
 - **`transforms/metadata.xslt`:**
   Provides basic `<html:head>` metadata.
-  This metadata is generated from `<html:meta>` elements with one o.
+  This metadata is generated from `<html:meta>` elements with one of
     the following `@itemprop` attributes :⁠—
 
   - **`urn:fdc:ladys.computer:20231231:Shu1She4:title`:**