docs - restructure admin guide top level topics (#3389)

* admin guide working w/dbs section - pull some topics up a level

* promote ddl, crud topics; move querying topic up

gpdb-doc/dita/admin_guide/admin_guide.ditamap

@@ -39,23 +39,21 @@
             <topicref href="roles_privs.xml" navtitle="Managing Roles and Privileges"
                 id="roles_privs"/>
         </topicref>
-        <topicref href="partIV.xml" navtitle="Working with Databases" id="partIV">
-            <topicref href="ddl/ddl.ditamap" format="ditamap"/>
-            <topicref href="dml.xml" navtitle="Managing Data" id="dml"/>
-            <topicref href="external/external-tables.ditamap" format="ditamap"/>
-            <topicref href="load/load.ditamap" format="ditamap"/>
-            <topicref href="query/query.ditamap" format="ditamap"/>
-        </topicref>
+        <topicref href="ddl/ddl.ditamap" format="ditamap"/>
+        <topicref href="dml.xml" navtitle="Managing Data" id="dml"/>
+        <topicref href="query/query.ditamap" navtitle="Querying Data" format="ditamap"/>
+        <topicref href="external/external-tables.ditamap" navtitle="Working with External Data" format="ditamap"/>
+        <topicref href="load/load.ditamap" navtitle="Loading and Unloading Data" format="ditamap"/>
         <topicref href="partV.xml">
             <topicref href="perf_intro.xml" navtitle="Defining Database Performance" id="perf_intro"/>
             <topicref href="perf_issues.xml" navtitle="Common Causes of Performance Issues"
                 id="perf_issues"/>
-            <topicref href="wlmgmt_intro.xml" navtitle="Resource Management Overview"
+            <topicref href="wlmgmt_intro.xml" navtitle="Workload Management Resource Overview"
                 id="wlmgmt_intro"/>
-            <topicref href="wlmgmt.xml" navtitle="Managing Resources" id="wlmgmt">
-                <topicref href="workload_mgmt.xml" navtitle="Managing Resources with Resource Queues"
+            <topicref href="wlmgmt.xml" navtitle="Managing Workload and Resources" id="wlmgmt">
+                <topicref href="workload_mgmt.xml" navtitle="Managing Workloads with Resource Queues"
                 id="workload_mgmt"/>
-                <topicref href="workload_mgmt_resgroups.xml" navtitle="Managing Resources with Resource Groups"
+                <topicref href="workload_mgmt_resgroups.xml" navtitle="Managing Workloads with Resource Groups"
                 id="workload_mgmt_resgroups"/>
             </topicref>
             <topicref href="perf_troubleshoot.xml" navtitle="Investigating a Performance Problem"

gpdb-doc/dita/admin_guide/external/external-tables.ditamap

 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE map PUBLIC "-//OASIS//DTD DITA Map//EN" "map.dtd">
 <map>
- <title>Working with External Tables</title>
- <topicref href="g-working-with-file-based-ext-tables.xml">
-  <topicref href="g-external-tables.xml"/>
-  <topicref href="g-file-protocol.xml"/>
-  <topicref href="g-gpfdist-protocol.xml"/>
-  <topicref href="g-gpfdists-protocol.xml"/>
-  <topicref href="g-gphdfs-protocol.xml"/>
-  <topicref href="g-s3-protocol.xml"/>
-  <topicref href="g-accessing-ext-files-custom-protocol.xml"/>
-  <topicref href="g-handling-errors-ext-table-data.xml"/>
-  <topicref href="g-creating-and-using-web-external-tables.xml" type="topic"/>
-  <topicref href="g-creating-external-tables---examples.xml" type="topic">
-   <topicref href="g-example-1-single-gpfdist-instance-on-single-nic-machine.xml"/>
-   <topicref href="g-example-2-multiple-gpfdist-instances.xml" type="topic"/>
-   <topicref href="g-example-3-multiple-gpfdists-instances.xml" type="topic"/>
-   <topicref href="g-example-4-single-gpfdist-instance-with-error-logging.xml" type="topic"/>
-   <topicref href="g-example-5-text-format-on-a-hadoop-distributed-file-server.xml" type="topic"/>
-   <topicref href="g-example-6-multiple-files-in-csv-format-with-header-rows.xml" type="topic"/>
-   <topicref href="g-example-7-readable-web-external-table-with-script.xml" type="topic"/>
-   <topicref href="g-example-8-writable-external-table-with-gpfdist.xml"/>
-   <topicref href="g-example-9-writable-external-web-table-with-script.xml"/>
-   <topicref href="g-example-10-readable-and-writable-external-tables-with-xml-transformations.xml"
+ <title>Working with External Data</title>
+ <topicref href="g-working-with-file-based-ext-tables.xml" navtitle="Working with External Data">
+   <topicref href="g-external-tables.xml" navtitle="Working with External Tables">
+      <topicref href="g-file-protocol.xml"/>
+      <topicref href="g-gpfdist-protocol.xml"/>
+      <topicref href="g-gpfdists-protocol.xml"/>
+      <topicref href="g-gphdfs-protocol.xml"/>
+      <topicref href="g-s3-protocol.xml"/>
+      <topicref href="g-accessing-ext-files-custom-protocol.xml"/>
+      <topicref href="g-handling-errors-ext-table-data.xml"/>
+      <topicref href="g-creating-and-using-web-external-tables.xml" type="topic"/>
+      <topicref href="g-creating-external-tables---examples.xml" type="topic">
+       <topicref href="g-example-1-single-gpfdist-instance-on-single-nic-machine.xml"/>
+       <topicref href="g-example-2-multiple-gpfdist-instances.xml" type="topic"/>
+       <topicref href="g-example-3-multiple-gpfdists-instances.xml" type="topic"/>
+       <topicref href="g-example-4-single-gpfdist-instance-with-error-logging.xml" type="topic"/>
+       <topicref href="g-example-5-text-format-on-a-hadoop-distributed-file-server.xml" type="topic"/>
+       <topicref href="g-example-6-multiple-files-in-csv-format-with-header-rows.xml" type="topic"/>
+       <topicref href="g-example-7-readable-web-external-table-with-script.xml" type="topic"/>
+       <topicref href="g-example-8-writable-external-table-with-gpfdist.xml"/>
+       <topicref href="g-example-9-writable-external-web-table-with-script.xml"/>
+       <topicref href="g-example-10-readable-and-writable-external-tables-with-xml-transformations.xml"
     type="topic"/>
-  </topicref>
- </topicref>
- <topicref href="g-using-hadoop-distributed-file-system--hdfs--tables.xml" type="topic">
+      </topicref>
+   </topicref>
+  <topicref href="g-using-hadoop-distributed-file-system--hdfs--tables.xml" type="topic">
   <topicref href="g-one-time-hdfs-protocol-installation.xml" type="topic"/>
   <topicref href="g-grant-privileges-for-the-hdfs-protocol.xml" type="topic"/>
   <topicref href="g-specify-hdfs-data-in-an-external-table-definition.xml" type="topic"/>
@@ -36,5 +36,6 @@
   <topicref href="g-reading-and-writing-custom-formatted-hdfs-data.xml" type="topic"/>
   <topicref href="g-hdfs-emr-config.xml"/>
  </topicref>
- <topicref href="g-using-the-greenplum-parallel-file-server--gpfdist-.xml"/>
+  <topicref href="g-using-the-greenplum-parallel-file-server--gpfdist-.xml"/>
+  </topicref>
 </map>

gpdb-doc/dita/admin_guide/external/g-external-tables.xml

@@ -2,7 +2,7 @@
 <!DOCTYPE topic
   PUBLIC "-//OASIS//DTD DITA Composite//EN" "ditabase.dtd">
 <topic id="topic3">
-   <title>Accessing File-Based External Tables</title>
+   <title>Defining External Tables</title>
    <shortdesc>External tables enable accessing external files as if they are regular database
       tables. They are often used to move data into and out of a Greenplum database.</shortdesc>
    <body>

gpdb-doc/dita/admin_guide/external/g-working-with-file-based-ext-tables.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE topic PUBLIC "-//OASIS//DTD DITA Topic//EN" "topic.dtd">
 <topic id="topic_f5l_qnh_kr">
-  <title>Working with External Tables</title>
+  <title>Working with External Data</title>
   <shortdesc>External tables provide access to data stored in data sources outside of Greenplum
     Database as if the data were stored in regular database tables. Data can be read from or written
     to external tables.</shortdesc>