diff --git a/.devcontainer/build.sh b/.devcontainer/build.sh
new file mode 100755
index 0000000..4648539
--- /dev/null
+++ b/.devcontainer/build.sh
@@ -0,0 +1,46 @@
+#!/usr/bin/env bash
+
+set -e
+
+FORMAT="${1:-xhtml}"
+
+case "$FORMAT" in
+  xhtml) DOCROOT="output/php-chunked-xhtml" ;;
+  php)   DOCROOT="../web-php" ;;
+  *)     echo "Usage: $0 [xhtml|php]" >&2; exit 1 ;;
+esac
+
+php ../doc-base/configure.php \
+    --disable-libxml-check \
+    --enable-xml-details \
+    --redirect-stderr-to-stdout \
+    --with-base-lang=extensions
+
+php -d memory_limit=512M ../phd/render.php \
+    --docbook ../doc-base/.manual.xml \
+    --output ./output \
+    --package PHP \
+    --format "$FORMAT"
+
+# Restart any existing server, then launch the new one in its own session so
+# Ctrl+C in the debug terminal only kills the log tail below. The server keeps
+# running until the next build replaces it (or the container shuts down).
+#
+# auto_prepend_file rewrites $_SERVER from the request's Host header so the PHP
+# format's $MYSITE-built URLs work behind Codespaces / other port forwarders.
+LOG="/tmp/php-server-${FORMAT}.log"
+pkill -f 'php -S 0.0.0.0:8080' 2>/dev/null || true
+PREPEND="$(cd "$(dirname "$0")" && pwd)/server-prepend.php"
+setsid nohup php -d "auto_prepend_file=$PREPEND" -S 0.0.0.0:8080 -t "$DOCROOT" \
+    >"$LOG" 2>&1 </dev/null &
+SERVER_PID=$!
+
+cat <<EOF
+
+  Server: http://localhost:8080  (pid $SERVER_PID, doc root: $DOCROOT)
+  Logs:   $LOG
+  Ctrl+C exits this tail; the server keeps running.
+
+EOF
+
+exec tail -f "$LOG"
diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
new file mode 100644
index 0000000..22afed7
--- /dev/null
+++ b/.devcontainer/devcontainer.json
@@ -0,0 +1,58 @@
+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/php
+{
+  "name": "PHP",
+  "image": "mcr.microsoft.com/devcontainers/php:8.4-trixie",
+
+  // Features to add to the dev container. More info: https://containers.dev/features.
+  "features": {
+    "ghcr.io/devcontainers/features/github-cli:1": {},
+    "ghcr.io/devcontainers/features/java:1": {
+      "version": "lts",
+      "installGradle": false,
+      "installMaven": false
+    }
+  },
+
+  // Configure tool-specific properties.
+  "customizations": {
+    // Configure properties specific to VS Code.
+    "vscode": {
+      "extensions": [
+        "editorconfig.editorconfig",
+        "redhat.vscode-xml"
+      ],
+      // Workspace-level launch config
+      "settings": {
+        "launch": {
+          "version": "0.2.0",
+          "configurations": [
+            {
+              "name": "Build XHTML & serve",
+              "type": "node-terminal",
+              "request": "launch",
+              "command": ".devcontainer/build.sh xhtml"
+            },
+            {
+              "name": "Build PHP web & serve",
+              "type": "node-terminal",
+              "request": "launch",
+              "command": ".devcontainer/build.sh php"
+            }
+          ]
+        }
+      }
+    }
+  },
+
+  // Use 'forwardPorts' to make a list of ports inside the container available locally.
+  "forwardPorts": [
+    8080
+  ],
+
+  // Use 'postCreateCommand' to run commands after the container is created.
+  "postCreateCommand": "sudo .devcontainer/post-create.sh",
+
+  // Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
+  // "remoteUser": "root"
+}
diff --git a/.devcontainer/post-create.sh b/.devcontainer/post-create.sh
new file mode 100755
index 0000000..2f9eb80
--- /dev/null
+++ b/.devcontainer/post-create.sh
@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+
+set -e
+
+WORKSPACE="$(cd "$(dirname "$0")/.." && pwd)"
+PARENT="$(dirname "$WORKSPACE")"
+OWNER="$(stat -c '%U' "$WORKSPACE")"
+
+# Clone doc-base, phd, and web-php as siblings of doc-en.
+[ -d "$PARENT/doc-base" ] || sudo -u "$OWNER" git -C "$PARENT" clone --depth 1 https://github.com/php/doc-base.git
+[ -d "$PARENT/phd" ]      || sudo -u "$OWNER" git -C "$PARENT" clone --depth 1 https://github.com/php/phd.git
+[ -d "$PARENT/web-php" ]  || sudo -u "$OWNER" git -C "$PARENT" clone --depth 1 https://github.com/php/web-php.git
+
+# doc-base's configure.php looks for the language source as a sibling directory
+[ -e "$PARENT/en" ] || sudo -u "$OWNER" ln -s "$WORKSPACE" "$PARENT/en"
+
+# Xdebug degrades performance and is not needed for the build, so disable it by default.
+rm -f /usr/local/etc/php/conf.d/xdebug.ini
+
+# Pre-create the served directories
+sudo -u "$OWNER" mkdir -p "$WORKSPACE/output/php-chunked-xhtml" "$WORKSPACE/output/php-web"
+sudo -u "$OWNER" rm -rf "$PARENT/web-php/manual/en"
+sudo -u "$OWNER" ln -s "$WORKSPACE/output/php-web" "$PARENT/web-php/manual/en"
+
+cat <<'EOF'
+
+  Devcontainer ready.
+
+  Build & serve:     F5 > "Build XHTML & serve"   (or "Build PHP web & serve")
+
+  View them:         http://localhost:8080
+
+EOF
diff --git a/.devcontainer/server-prepend.php b/.devcontainer/server-prepend.php
new file mode 100644
index 0000000..658e6f3
--- /dev/null
+++ b/.devcontainer/server-prepend.php
@@ -0,0 +1,15 @@
+<?php
+
+// This file rewrites $_SERVER from the request's Host header so the PHP
+// format's $MYSITE-built URLs work behind Codespaces / other port forwarders.
+
+$forwardedHttps = ($_SERVER['HTTP_X_FORWARDED_PROTO'] ?? '') === 'https';
+$hostHeader = $_SERVER['HTTP_X_FORWARDED_HOST'] ?? $_SERVER['HTTP_HOST'] ?? '';
+
+if ($hostHeader !== '') {
+    $_SERVER['HTTP_HOST'] = $hostHeader;
+}
+
+if ($forwardedHttps) {
+    $_SERVER['HTTPS'] = 'on';
+}
diff --git a/.docker/Dockerfile b/.docker/Dockerfile
new file mode 100644
index 0000000..c87e65d
--- /dev/null
+++ b/.docker/Dockerfile
@@ -0,0 +1,28 @@
+FROM php:8.4-cli
+ARG UID=1000
+ARG GID=1000
+
+RUN apt-get update && \
+    apt-get install -y git default-jre-headless
+
+WORKDIR /var/www
+
+ADD https://api.github.com/repos/php/phd/git/refs/heads/master version-phd.json
+ADD https://api.github.com/repos/php/doc-base/git/refs/heads/master version-doc-base.json
+
+RUN git clone --depth 1 https://github.com/php/phd.git &&  \
+    git clone --depth 1 https://github.com/php/doc-base.git && \
+    chown -R $UID:$GID phd doc-base
+
+RUN echo 'memory_limit = 512M' >> /usr/local/etc/php/conf.d/local.ini
+
+ENV FORMAT=xhtml
+
+CMD ["sh", "-c", "\
+php doc-base/configure.php --with-base-lang=extensions && \
+exec php phd/render.php \
+  --docbook doc-base/.manual.xml \
+  --output=/var/www/extensions/output \
+  --package PHP \
+  --format ${FORMAT} \
+"]
diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..02c4fef
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,12 @@
+; This file is for unifying the coding style for different editors and IDEs.
+; More information at https://editorconfig.org
+
+root = true
+
+[*.xml]
+charset = utf-8
+indent_size = 1
+indent_style = space
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..dcc145f
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,2 @@
+*.xml linguist-detectable
+*.ent linguist-language=XML linguist-detectable
diff --git a/.github/ISSUE_TEMPLATE/bug-report.yml b/.github/ISSUE_TEMPLATE/bug-report.yml
new file mode 100644
index 0000000..7fc8695
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/bug-report.yml
@@ -0,0 +1,43 @@
+name: "Bug Report"
+description: "Report an issue with the PHP documentation"
+labels: ["bug"]
+
+body:
+  - type: input
+    id: affected-page
+    attributes:
+      label: "Affected page"
+      description: "Provide the URL or file path of the affected documentation page."
+      placeholder: "e.g., https://www.php.net/manual/extensions/function.strlen.php"
+    validations:
+      required: true
+
+  - type: textarea
+    id: issue-description
+    attributes:
+      label: "Issue description"
+      description: "Describe the bug, including incorrect behavior, broken links, or missing content."
+      placeholder: "Describe what's wrong or missing on the page."
+    validations:
+      required: true
+
+  - type: textarea
+    id: steps-to-reproduce
+    attributes:
+      label: "Steps to reproduce"
+      description: "Explain how to reproduce the issue."
+      placeholder: |
+        1. Go to the page
+        2. Describe the actions
+        3. Explain the expected behavior
+    validations:
+      required: false
+
+  - type: textarea
+    id: suggested-fix
+    attributes:
+      label: "Suggested fix"
+      description: "Provide corrections or relevant references if possible."
+      placeholder: "e.g., link to correct behavior or suggested text/code."
+    validations:
+      required: false
diff --git a/.github/ISSUE_TEMPLATE/documentation-improvement.yml b/.github/ISSUE_TEMPLATE/documentation-improvement.yml
new file mode 100644
index 0000000..ddda53a
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/documentation-improvement.yml
@@ -0,0 +1,40 @@
+name: "Documentation Improvement"
+description: "Suggest an improvement for the PHP documentation"
+labels: ["enhancement"]
+
+body:
+  - type: input
+    id: affected-page
+    attributes:
+      label: "Affected page"
+      description: "Provide the URL or file path of the documentation to improve."
+      placeholder: "e.g., https://www.php.net/manual/extensions/function.strlen.php"
+    validations:
+      required: true
+
+  - type: textarea
+    id: current-issue
+    attributes:
+      label: "Current issue"
+      description: "Explain what is wrong or lacking, such as outdated info, missing examples, or unclear explanations."
+      placeholder: "Explain why the current documentation needs improvement."
+    validations:
+      required: true
+
+  - type: textarea
+    id: suggested-improvement
+    attributes:
+      label: "Suggested improvement"
+      description: "Provide updated content, better examples, or clarifications."
+      placeholder: "Share your proposed improvement."
+    validations:
+      required: true
+
+  - type: textarea
+    id: additional-context
+    attributes:
+      label: "Additional context (optional)"
+      description: "Provide references, links, or examples from official or relevant sources."
+      placeholder: "Optional references or further explanation."
+    validations:
+      required: false
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..3237fd1
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,10 @@
+version: 2
+updates:
+  - package-ecosystem: "devcontainers"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "monthly"
diff --git a/.github/workflows/docbook-cs.yaml b/.github/workflows/docbook-cs.yaml
new file mode 100644
index 0000000..6bf8f77
--- /dev/null
+++ b/.github/workflows/docbook-cs.yaml
@@ -0,0 +1,110 @@
+# https://docs.github.com/en/actions
+
+name: "DocBook Lint"
+
+on:
+  push:
+    branches:
+      - "main"
+  pull_request:
+    branches:
+      - "main"
+
+permissions:
+  contents: "read"
+
+concurrency:
+  group: "${{ github.workflow }}-${{ github.ref }}"
+  cancel-in-progress: true
+
+jobs:
+  docbook-cs:
+    name: "DocBook Style Check"
+    runs-on: "ubuntu-latest"
+
+    env:
+      # Base commit to diff against: PR base on pull_request, pre-push tip on push.
+      BASE_SHA: |-
+        ${{
+          case(
+            github.event_name == 'pull_request', github.event.pull_request.base.sha,
+            github.event_name == 'push', github.event.before,
+            'INVALID'
+          )
+        }}
+
+    strategy:
+      matrix:
+        language:
+          - "extensions"
+
+    steps:
+      - name: "Checkout php/doc-${{ matrix.language }}"
+        uses: "actions/checkout@v7"
+        with:
+          ref: "${{ github.event.pull_request.head.sha }}"
+          path: "${{ matrix.language }}"
+          fetch-depth: 50
+
+      - name: "Checkout php/doc-base"
+        uses: "actions/checkout@v7"
+        with:
+          path: "doc-base"
+          repository: "php/doc-base"
+
+      - name: "Checkout php/docbook-cs"
+        uses: "actions/checkout@v7"
+        with:
+          path: "docbook-cs"
+          repository: "php/docbook-cs"
+
+      - name: "Fetch diff base"
+        working-directory: "${{ matrix.language }}"
+        run: |
+          git fetch origin "$BASE_SHA" --depth=50
+          # Deepen until the merge-base is reachable (long-lived branches)
+          for i in 1 2 3 4 5; do
+            git merge-base "$BASE_SHA" HEAD >/dev/null 2>&1 && break
+            git fetch --deepen=100 origin "$BASE_SHA"
+          done
+
+      - name: "Setup PHP"
+        uses: "shivammathur/setup-php@v2"
+        with:
+          php-version: "8.5"
+          extensions: "dom, libxml, simplexml"
+          tools: composer, cs2pr
+        env:
+          fail-fast: true
+
+      - name: "Build documentation"
+        run: |
+          php doc-base/configure.php \
+            --disable-libxml-check \
+            --enable-xml-details \
+            --redirect-stderr-to-stdout \
+            --with-base-lang=${{ matrix.language }}
+
+      - name: "Install docbook-cs"
+        working-directory: "docbook-cs"
+        run: composer install --no-interaction --no-progress
+
+      - name: "Run docbook-cs with diff"
+        working-directory: "${{ matrix.language }}"
+        run: |
+          set -o pipefail
+          git diff "$BASE_SHA"...HEAD | php ../docbook-cs/bin/docbook-cs \
+            --report=checkstyle \
+            --no-colors > docbook-report.xml
+
+      - name: "Upload report"
+        if: ${{ ! cancelled() }}
+        uses: "actions/upload-artifact@v7"
+        with:
+          name: "docbook-report"
+          path: "${{ matrix.language }}/docbook-report.xml"
+
+      - name: "Annotate PR with violations"
+        if: ${{ ! cancelled() }}
+        working-directory: "${{ matrix.language }}"
+        run: cs2pr docbook-report.xml --colorize --prepend-filename
diff --git a/.github/workflows/integrate.yaml b/.github/workflows/integrate.yaml
new file mode 100644
index 0000000..733ec28
--- /dev/null
+++ b/.github/workflows/integrate.yaml
@@ -0,0 +1,54 @@
+# https://docs.github.com/en/actions
+
+name: "Integrate"
+
+on:
+  pull_request: null
+  push:
+    branches:
+      - "main"
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    name: "Build"
+
+    runs-on: "ubuntu-latest"
+
+    strategy:
+      matrix:
+        language:
+          - "extensions"
+
+    steps:
+      - name: "Checkout php/doc-${{ matrix.language }}"
+        uses: "actions/checkout@v7"
+        with:
+          path: "${{ matrix.language }}"
+          repository: "php/doc-${{ matrix.language }}"
+
+      - name: "Checkout php/doc-base"
+        uses: "actions/checkout@v7"
+        with:
+          path: "doc-base"
+          repository: "php/doc-base"
+
+      - name: "Setup PHP"
+        uses: "shivammathur/setup-php@v2"
+        with:
+          php-version: "8.5"
+          extensions: "dom, libxml, simplexml"
+        env:
+          fail-fast: true
+
+      - name: "Build documentation for ${{ matrix.language }}"
+        run: "php doc-base/configure.php --disable-libxml-check --enable-xml-details --redirect-stderr-to-stdout --with-base-lang=${{ matrix.language }}"
+
+      - name: "Upload .manual.xml"
+        uses: actions/upload-artifact@v7
+        with:
+          name: .manual.xml
+          path: doc-base/.manual.xml
+          include-hidden-files: true
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..3569f8c
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+output/
+temp/
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..558b9e1
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,34 @@
+.PHONY: *
+
+SHELL = /bin/sh
+
+CURRENT_UID := $(shell id -u)
+CURRENT_GID := $(shell id -g)
+
+#
+# If doc-base or phd exist as siblings to the current directory, add those as
+# volumes to our Docker runs.
+#
+
+PATHS := -v ${PWD}:/var/www/extensions
+ifneq ($(wildcard ../doc-base/LICENSE),)
+	PATHS += -v ${PWD}/../doc-base:/var/www/doc-base
+endif
+ifneq ($(wildcard ../phd/LICENSE),)
+	PATHS += -v ${PWD}/../phd:/var/www/phd
+endif
+
+xhtml: temp/.dockerbuilt
+	docker run --rm ${PATHS} -w /var/www -u ${CURRENT_UID}:${CURRENT_GID} php/doc-extensions
+
+php: temp/.dockerbuilt
+	docker run --rm ${PATHS} -w /var/www -u ${CURRENT_UID}:${CURRENT_GID} \
+		-e FORMAT=php php/doc-extensions
+
+build: temp/.dockerbuilt
+
+temp/.dockerbuilt: .docker/Dockerfile
+	docker build \
+		--build-arg UID=${CURRENT_UID} --build-arg GID=${CURRENT_GID} \
+		.docker -t php/doc-extensions
+	mkdir -p temp && touch temp/.dockerbuilt
diff --git a/bookinfo.xml b/bookinfo.xml
new file mode 100644
index 0000000..e32ce2f
--- /dev/null
+++ b/bookinfo.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<info xml:id="bookinfo" xmlns="http://docbook.org/ns/docbook">
+  <pubdate><?dbtimestamp format="Y-m-d"?></pubdate>
+
+  <abstract>
+   <simpara>
+    This manual documents third-party <acronym>PHP</acronym> extensions:
+    extensions that are maintained outside the
+    <literal>php-src</literal> repository, and are typically distributed
+    via <acronym>PECL</acronym> or <acronym>PIE</acronym>.
+   </simpara>
+   <simpara>
+    It complements the main PHP manual, which documents the language
+    itself and the extensions bundled with PHP, available at
+    <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="&url.php.docs;">&url.php.docs;</link>.
+   </simpara>
+  </abstract>
+
+  <legalnotice xml:id="copyright" xmlns:xlink="http://www.w3.org/1999/xlink">
+   <info><title>Copyright</title></info>
+   <simpara>
+    Copyright © 1997 - <?dbtimestamp format="Y"?> by the PHP Documentation Group.
+    This material may be distributed only subject to the terms and
+    conditions set forth in the Creative Commons Attribution 3.0
+    License or later. The latest version is presently available at
+    <link xlink:href="&url.cc.by;">&url.cc.by;</link>.
+   </simpara>
+  </legalnotice>
+
+ </info>
diff --git a/docbookcs.xml b/docbookcs.xml
new file mode 100644
index 0000000..8c56e5c
--- /dev/null
+++ b/docbookcs.xml
@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<docbookcs xmlns="https://php.github.io/docbook-cs/config"
+           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+           xsi:schemaLocation="https://php.github.io/docbook-cs/config
+                               https://php.github.io/docbook-cs/config.xsd">
+
+ <project>
+  <directory alias="doc-extensions">extensions</directory>
+  <directory>doc-base</directory>
+ </project>
+
+ <sniffs>
+  <sniff class="DocbookCS\Sniff\SimparaSniff" />
+  <sniff class="DocbookCS\Sniff\ExceptionNameSniff" />
+  <sniff class="DocbookCS\Sniff\AttributeOrderSniff" />
+  <sniff class="DocbookCS\Sniff\MixedIndentationSniff" />
+  <sniff class="DocbookCS\Sniff\TrailingWhitespaceSniff" />
+ </sniffs>
+
+ <paths>
+  <path>.</path>
+ </paths>
+
+ <entities>
+  <file>language-defs.ent</file>
+  <file>language-snippets.ent</file>
+  <directory>entities/</directory>
+  <directory>../doc-base/entities/</directory>
+  <file>../doc-base/temp/manual.ent</file>
+  <file>../doc-base/temp/entities.ent</file>
+  <file>../doc-base/temp/file-entities.ent</file>
+  <directory>../doc-base/temp/file-entities</directory>
+ </entities>
+
+ <exclude>
+  <pattern>output/*</pattern>
+ </exclude>
+
+</docbookcs>
diff --git a/language-defs.ent b/language-defs.ent
new file mode 100644
index 0000000..adb277a
--- /dev/null
+++ b/language-defs.ent
@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+
+<!-- Base entities used for building doc-extensions, for the time being -->
+<!ENTITY LANG                 "en">
+<!ENTITY ThirdPartyManual     "PHP Third-Party Extension Manual">
+<!ENTITY ThirdPartyExtensions "Third-Party Extensions">
+
+<!-- Part titles used mostly in manual.xml itself -->
+<!ENTITY PHPManual         "PHP Manual">
+<!ENTITY Seealso           "See also">
+<!ENTITY Date              "Date:">
+<!ENTITY GettingStarted    "Getting Started">
+<!ENTITY InstallAndConfigure "Installation and Configuration">
+<!ENTITY Installation      "Installation">
+<!ENTITY LanguageReference "Language Reference">
+<!ENTITY Features          "Features">
+<!ENTITY Security          "Security">
+<!ENTITY FunctionReference "Function Reference">
+<!ENTITY VariableandTypeRelatedExtensions         "Variable and Type Related Extensions">
+<!ENTITY TextProcessing                           "Text Processing">
+<!ENTITY AffectingPHPsBehaviour                   "Affecting PHP's Behaviour">
+<!ENTITY SessionExtensions                        "Session Extensions">
+<!ENTITY OtherBasicExtensions                     "Other Basic Extensions">
+<!ENTITY DatabaseExtensions                       "Database Extensions">
+<!ENTITY AbstractionLayers                        "Abstraction Layers">
+<!ENTITY VendorSpecificDatabaseExtensions         "Vendor Specific Database Extensions">
+<!ENTITY XMLManipulation                          "XML Manipulation">
+<!ENTITY WebServices                              "Web Services">
+<!ENTITY CreditCardProcessing                     "Credit Card Processing">
+<!ENTITY MathematicalExtensions                   "Mathematical Extensions">
+<!ENTITY CryptographyExtensions                   "Cryptography Extensions">
+<!ENTITY HumanLanguageandCharacterEncodingSupport "Human Language and Character Encoding Support">
+<!ENTITY FileSystemRelatedExtensions              "File System Related Extensions">
+<!ENTITY ProcessControlExtensions                 "Process Control Extensions">
+<!ENTITY MailRelatedExtensions                    "Mail Related Extensions">
+<!ENTITY AuthenticationServices                   "Authentication Services">
+<!ENTITY OtherServices                            "Other Services">
+<!ENTITY CompressionExtensions                    "Compression and Archive Extensions">
+<!ENTITY CalendarandEventRelatedExtensions        "Date and Time Related Extensions">
+<!ENTITY NonTextMIMEOutput                        "Non-Text MIME Output">
+<!ENTITY ImageProcessingandGeneration             "Image Processing and Generation">
+<!ENTITY AudioFormatsManipulation                 "Audio Formats Manipulation">
+<!ENTITY CommandLineSpecificExtensions            "Command Line Specific Extensions">
+<!ENTITY WindowsOnlyExtensions                    "Windows Only Extensions">
+<!ENTITY ServerSpecificExtensions                 "Server Specific Extensions">
+<!ENTITY SearchEngineExtensions                   "Search Engine Extensions">
+<!ENTITY MiscExtensions                           "Misc Extensions">
+<!ENTITY UIExtensions                             "GUI Extensions">
+<!ENTITY Appendices        "Appendices">
+<!ENTITY PEAR              "PEAR: the PHP Extension and Application Repository">
+<!ENTITY FAQ               "Frequently Asked Questions">
+<!ENTITY FAQabbrev         "FAQ">
+<!ENTITY Internals         "PHP and Zend Engine Internals">
+<!ENTITY Internals2        "PHP at the Core: A Hacker's Guide">
+<!ENTITY ZendAPI           "Zend API: Hacking the Core of PHP">
+<!ENTITY IndexListing      "Index listing">
+<!ENTITY FunctionListing   "Function and Method listing">
+<!ENTITY FunctionListingDescription   "List of all the functions and methods in the manual">
+<!ENTITY ExampleListing    "Example listing">
+<!ENTITY ExampleListingDescription   "List of all the examples in the manual">
+<!ENTITY ChangelogListingTitle "Changelog">
+<!ENTITY ChangelogListingDescription "The following changes have been made to classes/functions/methods of this extension.">
+<!ENTITY ChangelogListingBundledDescription "The following changes have been made to functions of bundled extensions.">
+<!ENTITY CHMEdition        "HTML Help Edition">
+<!ENTITY ReservedConstants "Predefined Constants">
+<!ENTITY MissingStuff      "Missing Stuff">
+<!ENTITY AndSeveralOthers  "And several others">
+<!ENTITY Version           "Version">
+<!ENTITY Description       "Description">
+<!ENTITY Changeable        "Changeable">
+<!ENTITY ConfigureOptions  "Configure Options">
+<!ENTITY Default           "Default">
+<!ENTITY Definition        "Definition">
+<!ENTITY Functions         "Functions">
+<!ENTITY Name              "Name">
+<!ENTITY Alias             "Alias of">
+<!ENTITY Type              "Type">
+<!ENTITY Changelog         "Changelog">
+<!ENTITY Methods           "Methods">
+<!ENTITY InheritedMethods  "Inherited methods">
+<!ENTITY InheritedProperties "Inherited properties">
+<!ENTITY Properties        "Properties">
+<!ENTITY InheritedConstants "Inherited constants">
+<!ENTITY Constants         "Constants">
+<!ENTITY Constructor       "Constructor">
+<!ENTITY NotAvailable      "Not Available">
+
+<!-- These are used in reference/$extname/reference.xml and other
+supplemental files to mark section titles -->
+<!ENTITY reftitle.changelog    '<title xmlns="http://docbook.org/ns/docbook">&Changelog;</title>'>
+<!ENTITY reftitle.classes      '<title xmlns="http://docbook.org/ns/docbook">Predefined Classes</title>'>
+<!ENTITY reftitle.classsynopsis '<title xmlns="http://docbook.org/ns/docbook">Class synopsis</title>'>
+<!ENTITY reftitle.enumsynopsis '<title xmlns="http://docbook.org/ns/docbook">Enum synopsis</title>'>
+<!ENTITY reftitle.constants    '<title xmlns="http://docbook.org/ns/docbook">Predefined Constants</title>'>
+<!ENTITY reftitle.constructor  '<title xmlns="http://docbook.org/ns/docbook">Constructor</title>'>
+<!ENTITY reftitle.description  '<title xmlns="http://docbook.org/ns/docbook">Description</title>'>
+<!ENTITY reftitle.encoding     '<title xmlns="http://docbook.org/ns/docbook">Encoding</title>'>
+<!ENTITY reftitle.examples     '<title xmlns="http://docbook.org/ns/docbook">Examples</title>'>
+<!ENTITY reftitle.exceptions   '<title xmlns="http://docbook.org/ns/docbook">Exceptions</title>'>
+<!ENTITY reftitle.errors       '<title xmlns="http://docbook.org/ns/docbook">Errors/Exceptions</title>'>
+<!ENTITY reftitle.faq          '<title xmlns="http://docbook.org/ns/docbook">&FAQ;</title>'>
+<!ENTITY reftitle.install      '<title xmlns="http://docbook.org/ns/docbook">Installation</title>'>
+<!ENTITY reftitle.intro        '<title xmlns="http://docbook.org/ns/docbook">Introduction</title>'>
+<!ENTITY reftitle.indices      '<title xmlns="http://docbook.org/ns/docbook">Indices</title>'>
+<!ENTITY reftitle.interfacesynopsis '<title xmlns="http://docbook.org/ns/docbook">Interface synopsis</title>'>
+<!ENTITY reftitle.methods      '<title xmlns="http://docbook.org/ns/docbook">Methods</title>'>
+<!ENTITY reftitle.mysqlnd      '<title xmlns="http://docbook.org/ns/docbook">MySQL Native Driver Only</title>'>
+<!ENTITY reftitle.notes        '<title xmlns="http://docbook.org/ns/docbook">Notes</title>'>
+<!ENTITY reftitle.parameters   '<title xmlns="http://docbook.org/ns/docbook">Parameters</title>'>
+<!ENTITY reftitle.options      '<title xmlns="http://docbook.org/ns/docbook">Options</title>'>
+<!ENTITY reftitle.properties   '<title xmlns="http://docbook.org/ns/docbook">Properties</title>'>
+<!ENTITY reftitle.required     '<title xmlns="http://docbook.org/ns/docbook">Requirements</title>'>
+<!ENTITY reftitle.resources    '<title xmlns="http://docbook.org/ns/docbook">Resource Types</title>'>
+<!ENTITY reftitle.runtime      '<title xmlns="http://docbook.org/ns/docbook">Runtime Configuration</title>'>
+<!ENTITY reftitle.returnvalues '<title xmlns="http://docbook.org/ns/docbook">Return Values</title>'>
+<!ENTITY reftitle.seealso      '<title xmlns="http://docbook.org/ns/docbook">See Also</title>'>
+<!ENTITY reftitle.setup        '<title xmlns="http://docbook.org/ns/docbook">Installing/Configuring</title>'>
+<!ENTITY reftitle.unicode      '<title xmlns="http://docbook.org/ns/docbook">Unicode</title>'>
+<!ENTITY reftitle.usage        '<title xmlns="http://docbook.org/ns/docbook">Usage</title>'>
diff --git a/language-snippets.ent b/language-snippets.ent
new file mode 100644
index 0000000..6424e77
--- /dev/null
+++ b/language-snippets.ent
@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!-- Language snippets should be placed here -->
diff --git a/manual.xml b/manual.xml
new file mode 100644
index 0000000..a1ecb4b
--- /dev/null
+++ b/manual.xml
@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="utf-8"?>
+<?do-not-translate?>
+<!DOCTYPE PHPDOC [
+
+<!--
+ This tree is not named after a language, so &LANG; from conf.dtd would
+ expand to "extensions". We manually override it here: the first declaration wins.
+-->
+<!ENTITY LANG "en">
+
+<!ENTITY % configure SYSTEM "./temp/conf.dtd">
+%configure;
+
+%text-entities;
+
+%translation-defs;
+%translation-snippets;
+%translation-extensions;
+
+%language-defs;
+%language-snippets;
+%language-extensions;
+
+%base-entities;
+%file-entities;
+
+]>
+
+<set xml:id="index" xmlns="http://docbook.org/ns/docbook" version="5.2" xml:lang="&LANG;">
+ <title>&ThirdPartyManual;</title>
+ &bookinfo;
+
+ <!--
+  Each third-party extension lives in its own directory under reference/
+  and is included here as a book entity, one per extension.
+ -->
+ <set xml:id="extensions">
+  <title>&ThirdPartyExtensions;</title>
+  &reference.example.book;
+ </set>
+
+</set>
diff --git a/reference/example/book.xml b/reference/example/book.xml
new file mode 100644
index 0000000..20771e1
--- /dev/null
+++ b/reference/example/book.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<book xml:id="book.example" xmlns="http://docbook.org/ns/docbook">
+ <title>Example</title>
+ <titleabbrev>Example</titleabbrev>
+
+ <preface xml:id="intro.example">
+  &reftitle.intro;
+  <simpara>
+   Placeholder book serving as a template for third-party extension
+   documentation; it will be removed once real extensions are added.
+  </simpara>
+ </preface>
+</book>