From 1a7bbe5469935af95fa47f5de1f0b197320aa341 Mon Sep 17 00:00:00 2001
From: Marshall Lochbaum <mwlochbaum@gmail.com>
Date: Wed, 6 Jul 2022 22:01:22 -0400
Subject: Rearrange documentation index somewhat

---
 doc/README.md       | 24 ++++++++++++------------
 docs/doc/index.html | 34 ++++++++++++++++++++++++++--------
 2 files changed, 38 insertions(+), 20 deletions(-)

diff --git a/doc/README.md b/doc/README.md
index c9844b7c..7d0a1fd4 100644
--- a/doc/README.md
+++ b/doc/README.md
@@ -19,23 +19,23 @@ References:
 - [BQN as combinatory logic](birds.md)
 
 Concepts:
-- [Context-free grammar](context.md)
 - [Expression syntax](expression.md)
+  - [Context-free grammar](context.md)
 - [Arrays](array.md)
-- [Based array theory](based.md)
-- [Array notation and display](arrayrepr.md)
-- [Array indices](indices.md)
-- [Fill elements](fill.md)
-- [The leading axis model](leading.md)
+  - [Based array theory](based.md)
+  - [Array notation and display](arrayrepr.md)
+  - [Array indices](indices.md)
+  - [Fill elements](fill.md)
+  - [The leading axis model](leading.md)
 - [Functions and modifiers](ops.md)
+  - [Functional programming](functional.md)
 - [Tacit programming](tacit.md)
-- [Function trains](train.md)
+  - [Function trains](train.md)
 - [Blocks](block.md)
-- [Lexical scoping](lexical.md)
-- [Functional programming](functional.md)
-- [Control flow](control.md)
+  - [Lexical scoping](lexical.md)
+  - [Control flow](control.md)
 - [Namespaces](namespace.md)
-- [Object-oriented programming](oop.md)
+  - [Object-oriented programming](oop.md)
 
 Primitives:
 - [Arithmetic: `+-×÷⋆√⌊⌈|≤<>≥=≠`](arithmetic.md)
@@ -56,8 +56,8 @@ Primitives:
 - [Indices and Replicate: `/`](replicate.md)
 - [Join and Join To: `∾`](join.md)
 - [Logical functions: `∧∨¬`](logic.md)
-- [Match: `≡≢`](match.md)
 - [Mapping: `¨⌜`](map.md)
+- [Match: `≡≢`](match.md)
 - [Ordering functions: `∧∨⍋⍒`](order.md)
 - [Pair: `⋈`](pair.md)
 - [Pick: `⊑`](pick.md)
diff --git a/docs/doc/index.html b/docs/doc/index.html
index c86ab0d3..deded4be 100644
--- a/docs/doc/index.html
+++ b/docs/doc/index.html
@@ -24,24 +24,42 @@
 </ul>
 <p>Concepts:</p>
 <ul>
+<li><a href="expression.html">Expression syntax</a>
+<ul>
 <li><a href="context.html">Context-free grammar</a></li>
-<li><a href="expression.html">Expression syntax</a></li>
-<li><a href="array.html">Arrays</a></li>
+</ul>
+</li>
+<li><a href="array.html">Arrays</a>
+<ul>
 <li><a href="based.html">Based array theory</a></li>
 <li><a href="arrayrepr.html">Array notation and display</a></li>
 <li><a href="indices.html">Array indices</a></li>
 <li><a href="fill.html">Fill elements</a></li>
 <li><a href="leading.html">The leading axis model</a></li>
-<li><a href="ops.html">Functions and modifiers</a></li>
-<li><a href="tacit.html">Tacit programming</a></li>
+</ul>
+</li>
+<li><a href="ops.html">Functions and modifiers</a>
+<ul>
+<li><a href="functional.html">Functional programming</a></li>
+</ul>
+</li>
+<li><a href="tacit.html">Tacit programming</a>
+<ul>
 <li><a href="train.html">Function trains</a></li>
-<li><a href="block.html">Blocks</a></li>
+</ul>
+</li>
+<li><a href="block.html">Blocks</a>
+<ul>
 <li><a href="lexical.html">Lexical scoping</a></li>
-<li><a href="functional.html">Functional programming</a></li>
 <li><a href="control.html">Control flow</a></li>
-<li><a href="namespace.html">Namespaces</a></li>
+</ul>
+</li>
+<li><a href="namespace.html">Namespaces</a>
+<ul>
 <li><a href="oop.html">Object-oriented programming</a></li>
 </ul>
+</li>
+</ul>
 <p>Primitives:</p>
 <ul>
 <li><a href="arithmetic.html">Arithmetic: <code><span class='Function'>+-×÷⋆√⌊⌈|≤&lt;&gt;≥=≠</span></code></a></li>
@@ -62,8 +80,8 @@
 <li><a href="replicate.html">Indices and Replicate: <code><span class='Function'>/</span></code></a></li>
 <li><a href="join.html">Join and Join To: <code><span class='Function'>∾</span></code></a></li>
 <li><a href="logic.html">Logical functions: <code><span class='Function'>∧∨¬</span></code></a></li>
-<li><a href="match.html">Match: <code><span class='Function'>≡≢</span></code></a></li>
 <li><a href="map.html">Mapping: <code><span class='Modifier'>¨⌜</span></code></a></li>
+<li><a href="match.html">Match: <code><span class='Function'>≡≢</span></code></a></li>
 <li><a href="order.html">Ordering functions: <code><span class='Function'>∧∨⍋⍒</span></code></a></li>
 <li><a href="pair.html">Pair: <code><span class='Function'>⋈</span></code></a></li>
 <li><a href="pick.html">Pick: <code><span class='Function'>⊑</span></code></a></li>
-- 
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