docs: extend readme

README.org

@@ -4,24 +4,34 @@
 * guile-toml
 
 ** Installation
-For now: add this folder to =GUILE_LOAD_PATH=
+For now: add this folder to ~GUILE_LOAD_PATH~
 ** Usage
-Similar approach to =guile-json=.
+When parsing and building TOML documents, guile-toml follows [[https://github.com/aconchillo/guile-json][guile-json]] as close as possible. TOML types correspon to Guile types according to the following table:
 
-| TOML               | Guile                            |
-|--------------------+----------------------------------|
-| string             | string                           |
-| number             | number (TODO: octal etc, float?) |
-| key-value pair     | alist                            |
-| array              | vector                           |
-| datetime etc       | TODO                             |
-| true               | #t (TODO)                        |
-| false              | #f                               |
-| nan                | TODO                             |
-| inf                | TODO                             |
-| small / big floats | TODO                             |
-| unicode checking   | TODO                             |
+| TOML           | Guile            |
+|----------------+------------------|
+| string         | string           |
+| key-value pair | alist            |
+| array          | vector           |
+| integer/float  | real             |
+| true           | #t               |
+| false          | #f               |
+| datetime       | SRFI-19 date [1] |
+| nan            | +nan.0           |
+| {+-}inf        | {+-}inf.0        |
 
-To start using: =(use-modules (toml))=
-** Reading TOML documents
-- =(toml->scm str)=
+To start using guile-toml: ~(use-modules (toml))~
+
+[1]: TOML's ~time-local~ is parsed same as a ~datetime-local~ on the date of ~1970-01-01~.
+
+*** Reading TOML documents
+- ~(toml->scm str)~
+  Reads a TOML document from the given string.
+*** Building TOML documents
+- ~(scm->toml native #:optional port)~
+  Not implemented yet.
+** Examples
+#+begin_src scheme
+> (toml->scm "[a]\n b.c = \"hi world\"")
+(("a" ("b" ("c" . "hi world"))))
+#+end_src