Document facets and fields

src/main/xar-resources/data/lucene/listings/listing-50.txt

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+<?xml version="1.0" encoding="UTF-8"?>
+<collection xmlns="http://exist-db.org/collection-config/1.0">
+    <index xmlns:db="http://docbook.org/ns/docbook" xmlns:xs="http://www.w3.org/2001/XMLSchema">
+        <lucene>
+            <text qname="db:article">
+                <facet dimension="keyword" expression="db:info/db:keywordset/db:keyword"/>
+            </text>
+        </lucene>
+    </index>
+</collection>

src/main/xar-resources/data/lucene/listings/listing-51.txt

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+<?xml version="1.0" encoding="UTF-8"?>
+<collection xmlns="http://exist-db.org/collection-config/1.0">
+    <index xmlns:db="http://docbook.org/ns/docbook" xmlns:xs="http://www.w3.org/2001/XMLSchema">
+        <lucene>
+            <text qname="db:article">
+                <facet dimension="keyword" expression="db:info/db:keywordset/db:keyword"/>
+                <field name="title" expression="db:info/db:title"/>
+                <field name="author" expression="for $au in db:info/db:author string-join(($au/db:personname/db:firstname, $au/db:personname/db:surname), ' ')"/>
+            </text>
+        </lucene>
+    </index>
+</collection>

src/main/xar-resources/data/lucene/listings/listing-52.txt

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+<?xml version="1.0" encoding="UTF-8"?>
+<collection xmlns="http://exist-db.org/collection-config/1.0">
+    <index xmlns:db="http://docbook.org/ns/docbook" xmlns:xs="http://www.w3.org/2001/XMLSchema">
+        <lucene>
+            <text qname="db:article">
+                <facet dimension="keyword" expression="db:info/db:keywordset/db:keyword"/>
+                <facet dimension="date" expression="tokenize(db:info/db:pubdate, '-')" hierarchical="yes"/>
+            </text>
+        </lucene>
+    </index>
+</collection>

src/main/xar-resources/data/lucene/listings/listing-53.txt

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+//db:article[ft:query(., "title:(xquery AND language) AND xml")]

src/main/xar-resources/data/lucene/listings/listing-54.txt

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+for $article in collection("/db/articles")//db:article[ft:query(., "xquery", map { "fields": ("title", "author") })]
+order by ft:field($article, "title"), ft:field($article, "author")[1]
+return
+    $article

src/main/xar-resources/data/lucene/listings/listing-55.txt

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+//db:article[ft:query(., (), map { "fields": ("title", "author") })]

src/main/xar-resources/data/lucene/listings/listing-56.txt

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+let $result := collection("/db/articles")//db:article[ft:query(., "xml")]
+let $facets := ft:facets($result, "keyword", ())
+return
+    <table>
+    {
+        map:for-each($facets, function($label, $count) {
+            <tr><td>{$label}</td><td>{$count}</td></tr>
+        })
+    }
+    </table>

src/main/xar-resources/data/lucene/listings/listing-57.txt

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+let $options := map { 
+    "facets": map { 
+        "keyword": ("indexing", "facets")
+    }
+}
+return
+    collection("/db/articles")//db:article[ft:query(., "xml", $options)]

src/main/xar-resources/data/lucene/listings/listing-58.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<collection xmlns="http://exist-db.org/collection-config/1.0">
+    <index xmlns:db="http://docbook.org/ns/docbook" xmlns:xs="http://www.w3.org/2001/XMLSchema">
+        <lucene>
+            <module uri="http://exist-db.org/lucene/test/" prefix="idx" at="module.xql"/>
+            <text qname="db:article">
+                <facet dimension="keyword" expression="db:info/db:keywordset/db:keyword"/>
+                <field name="title" expression="db:info/db:title"/>
+                <field name="author" expression="idx:author(db:info/db:author)"/>
+            </text>
+        </lucene>
+    </index>
+</collection>

src/main/xar-resources/data/lucene/listings/listing-59.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<collection xmlns="http://exist-db.org/collection-config/1.0">
+    <index xmlns:db="http://docbook.org/ns/docbook" xmlns:xs="http://www.w3.org/2001/XMLSchema">
+        <lucene>
+            <analyzer class="org.apache.lucene.analysis.de.GermanAnalyzer" id="german"/>
+            <analyzer class="org.apache.lucene.analysis.en.EnglishAnalyzer" id="english"/>
+            <text qname="db:article" index="no">
+                <field name="english" if="@xml:lang='en'" analyzer="english"/>
+                <field name="german" if="@xml:lang='de'" analyzer="german"/>
+            </text>
+        </lucene>
+    </index>
+</collection>