-<chapter id="tutorial">
- <!-- $Id: tutorial.xml,v 1.4 2008-02-07 12:36:35 marc Exp $ -->
- <title>Tutorial</title>
-
-
- <sect1 id="tutorial-oai">
- <title>A first &acro.oai; indexing example</title>
-
- <para>
- In this section, we will test the system by indexing a small set of
- sample &acro.oai; records that are included with the &zebra; distribution,
- running a &zebra; server against the newly created database, and
- searching the indexes with a client that connects to that server.
- </para>
- <para>
- Go to the <literal>examples/oai-pmh</literal> subdirectory of the
- distribution archive, or make a deep copy of the Debian installation
- directory
- <literal>/usr/share/idzebra-2.0.-examples/oai-pmh</literal>.
- An XML file containing multiple &acro.oai;
- records is located in the sub
- directory <literal>examples/oai-pmh/data</literal>.
- </para>
- <para>
+ <chapter id="tutorial">
+ <title>Tutorial</title>
+
+
+ <sect1 id="tutorial-oai">
+ <title>A first &acro.oai; indexing example</title>
+
+ <para>
+ In this section, we will test the system by indexing a small set of
+ sample &acro.oai; records that are included with the &zebra; distribution,
+ running a &zebra; server against the newly created database, and
+ searching the indexes with a client that connects to that server.
+ </para>
+ <para>
+ Go to the <literal>examples/oai-pmh</literal> subdirectory of the
+ distribution archive, or make a deep copy of the Debian installation
+ directory
+ <literal>/usr/share/idzebra-2.0.-examples/oai-pmh</literal>.
+ An XML file containing multiple &acro.oai;
+ records is located in the sub
+ directory <literal>examples/oai-pmh/data</literal>.
+ </para>
+ <para>
Additional OAI test records can be downloaded by running a shell
- script (you may want to abort the script when you have waitet
- longer than your coffe brews ..).
- <screen>
+ script (you may want to abort the script when you have waited
+ longer than your coffee brews ..).
+ <screen>
cd data
./fetch_OAI_data.sh
cd ../
- </screen>
- </para>
- <para>
+ </screen>
+ </para>
+ <para>
To index these &acro.oai; records, type:
- <screen>
- zebraidx-2.0 -c conf/zebra.cfg init
- zebraidx-2.0 -c conf/zebra.cfg update data
- zebraidx-2.0 -c conf/zebra.cfg commit
- </screen>
- In case you have not installed zebra yet but have compiled the
+ <screen>
+ zebraidx-2.0 -c conf/zebra.cfg init
+ zebraidx-2.0 -c conf/zebra.cfg update data
+ zebraidx-2.0 -c conf/zebra.cfg commit
+ </screen>
+ In case you have not installed zebra yet but have compiled the
binaries from this tarball, use the following command form:
- <screen>
- ../../index/zebraidx -c conf/zebra.cfg this and that
- </screen>
- On some systems the &zebra; binaries are installed under the
- generic names, you need to use the following command form:
- <screen>
- zebraidx -c conf/zebra.cfg this and that
- </screen>
- </para>
-
- <para>
- In this command, the word <literal>update</literal> is followed
- by the name of a directory: <literal>zebraidx</literal> updates all
- files in the hierarchy rooted at <literal>data</literal>.
- The command option
- <literal>-c conf/zebra.cfg</literal> points to the proper
- configuration file.
- </para>
-
- <para>
- You might ask yourself how &acro.xml; content is indexed using &acro.xslt;
- stylesheets: to satisfy your curiosity, you might want to run the
- indexing transformation on an example debugging &acro.oai; record.
- <screen>
- xsltproc conf/oai2index.xsl data/debug-record.xml
- </screen>
+ <screen>
+ ../../index/zebraidx -c conf/zebra.cfg this and that
+ </screen>
+ On some systems the &zebra; binaries are installed under the
+ generic names, you need to use the following command form:
+ <screen>
+ zebraidx -c conf/zebra.cfg this and that
+ </screen>
+ </para>
+
+ <para>
+ In this command, the word <literal>update</literal> is followed
+ by the name of a directory: <literal>zebraidx</literal> updates all
+ files in the hierarchy rooted at <literal>data</literal>.
+ The command option
+ <literal>-c conf/zebra.cfg</literal> points to the proper
+ configuration file.
+ </para>
+
+ <para>
+ You might ask yourself how &acro.xml; content is indexed using &acro.xslt;
+ stylesheets: to satisfy your curiosity, you might want to run the
+ indexing transformation on an example debugging &acro.oai; record.
+ <screen>
+ xsltproc conf/oai2index.xsl data/debug-record.xml
+ </screen>
Here you see the &acro.oai; record transformed into the indexing
&acro.xml; format. &zebra; is creating several inverted indexes,
and their name and type are clearly visible in the indexing
&acro.xml; format.
- </para>
-
- <para>
- If your indexing command was successful, you are now ready to
- fire up a server. To start a server on port 9999, type:
- <screen>
- zebrasrv-2.0 -c conf/zebra.cfg @:9999
- </screen>
- </para>
-
- <para>
- The &zebra; index that you have just created has a single database
- named <literal>Default</literal>.
- The database contains several &acro.oai; records, and the server will
- return records in the &acro.xml; format only. The indexing machine
- did the splitting into individual records just behind the scenes.
- </para>
-
-
- </sect1>
-
- <sect1 id="tutorial-oai-sru-pqf">
- <title>Searching the &acro.oai; database by web service</title>
+ </para>
+
+ <para>
+ If your indexing command was successful, you are now ready to
+ fire up a server. To start a server on port 9999, type:
+ <screen>
+ zebrasrv-2.0 -c conf/zebra.cfg @:9999
+ </screen>
+ </para>
+
+ <para>
+ The &zebra; index that you have just created has a single database
+ named <literal>Default</literal>.
+ The database contains several &acro.oai; records, and the server will
+ return records in the &acro.xml; format only. The indexing machine
+ did the splitting into individual records just behind the scenes.
+ </para>
- <para>
+
+ </sect1>
+
+ <sect1 id="tutorial-oai-sru-pqf">
+ <title>Searching the &acro.oai; database by web service</title>
+
+ <para>
&zebra; has a build-in web service, which is close to the
&acro.sru; standard web service. We use it to access our new
database using any &acro.xml; enabled web browser.
<para>
Searching and retrieving &acro.xml; records is easy. For example,
- you can point your browser to one of the following url's to
+ you can point your browser to one of the following URLs to
search for the term <literal>the</literal>. Just point your
browser at this link:
<ulink
- url="http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=the">
- http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=the</ulink>
+ url="http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=the">
+ http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=the</ulink>
</para>
<warning>
<para>
- These URL's woun't work unless you have indexed the example data
+ These URLs won't work unless you have indexed the example data
and started an &zebra; server as outlined in the previous section.
</para>
</warning>
<para>
In case we actually want to retrieve one record, we need to alter
- our URl to the following
- <ulink url="http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=the&startRecord=1&maximumRecords=1&recordSchema=dc">
- http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=the&startRecord=1&maximumRecords=1&recordSchema=dc
- </ulink>
+ our URL to the following
+ <ulink url="http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=the&startRecord=1&maximumRecords=1&recordSchema=dc">
+ http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=the&startRecord=1&maximumRecords=1&recordSchema=dc
+ </ulink>
</para>
<para>
This way we can page through our result set in chunks of records,
for example, we access the 6th to the 10th record using the URL
- <ulink url="http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=the&startRecord=6&maximumRecords=5&recordSchema=dc">
- http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=the&startRecord=6&maximumRecords=5&recordSchema=dc
- </ulink>
- </para>
+ <ulink url="http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=the&startRecord=6&maximumRecords=5&recordSchema=dc">
+ http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=the&startRecord=6&maximumRecords=5&recordSchema=dc
+ </ulink>
+ </para>
-<!--
+ <!--
relation tests:
-
- <ulink url="">
+
+ <ulink url="">
http://localhost:9999/?version=1.1&operation=searchRetrieve
- &x-pquery=title%3Cthe
--->
- </sect1>
+ &x-pquery=title%3Cthe
+ -->
+ </sect1>
- <sect1 id="tutorial-oai-sru-present">
- <title>Presenting search results in different formats</title>
+ <sect1 id="tutorial-oai-sru-present">
+ <title>Presenting search results in different formats</title>
<para>
&zebra; uses &acro.xslt; stylesheets for both &acro.xml;record
<literal>conf/oai2dc.xsl</literal>, and
the <literal>zebra</literal> schema implemented in
<literal>conf/oai2zebra.xsl</literal>.
- The URL's for acessing both are the same, except for the different
+ The URLs for accessing both are the same, except for the different
value of the <literal>recordSchema</literal> parameter:
<ulink url="http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=the&startRecord=1&maximumRecords=1&recordSchema=dc">
http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=the&startRecord=1&maximumRecords=1&recordSchema=dc
<screen>
xsltproc conf/oai2dc.xsl data/debug-record.xml
xsltproc conf/oai2zebra.xsl data/debug-record.xml
- </screen>
+ </screen>
Notice also that the &zebra; specific parameters are injected by
the engine when retrieving data, therefore some of the attributes
in the <literal>zebra</literal> retrieval schema are not filled
</ulink>
</para>
- </sect1>
+ </sect1>
- <sect1 id="tutorial-oai-sru-searches">
- <title>More interesting searches</title>
+ <sect1 id="tutorial-oai-sru-searches">
+ <title>More interesting searches</title>
<para>
The &acro.oai; indexing example defines many different index
names, a study of the <literal>conf/oai2index.xsl</literal>
stylesheet reveals the following word type indexes (i.e. those
- swith suffix <literal>:w</literal>):
+ with suffix <literal>:w</literal>):
<screen>
any:w
- dc_title:w
- dc_creator:w
- dc_subject:w
- dc_description:w
- dc_contributor:w
- dc_publisher:w
- dc_language:w
- dc_rights:w
+ title:w
+ author:w
+ subject:w
+ description:w
+ contributor:w
+ publisher:w
+ language:w
+ rights:w
</screen>
- By default, searches do access the <literal>anr:w</literal> index,
+ By default, searches do access the <literal>any:w</literal> index,
but we can direct searches to any access point by constructing the
correct &acro.pqf; query. For example, to search in titles only,
we use
<ulink
- url="http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=@attr
- 1=dc_title the&startRecord=1&maximumRecords=1&recordSchema=dc">
+ url="http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=@attr
+ 1=title the&startRecord=1&maximumRecords=1&recordSchema=dc">
http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=@attr
- 1=dc_title the&startRecord=1&maximumRecords=1&recordSchema=dc
+ 1=title the&startRecord=1&maximumRecords=1&recordSchema=dc
</ulink>
</para>
Similar we can direct searches to the other indexes defined. Or we
can create boolean combinations of searches on different
indexes. In this case we search for <literal>the</literal> in
- <literal>dc_title</literal> and for <literal>fish</literal> in
- <literal>dc_description</literal> using the query
- <literal>@and @attr 1=dc_title the @attr 1=dc_description fish</literal>.
+ <literal>title</literal> and for <literal>fish</literal> in
+ <literal>description</literal> using the query
+ <literal>@and @attr 1=title the @attr 1=description fish</literal>.
<ulink
- url="http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=@and
- @attr 1=dc_title the
- @attr 1=dc_description
- fish&startRecord=1&maximumRecords=1&recordSchema=dc">
+ url="http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=@and
+ @attr 1=title the
+ @attr 1=description
+ fish&startRecord=1&maximumRecords=1&recordSchema=dc">
http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=@and
- @attr 1=dc_title the
- @attr 1=dc_description fish&startRecord=1&maximumRecords=1&recordSchema=dc
+ @attr 1=title the
+ @attr 1=description fish&startRecord=1&maximumRecords=1&recordSchema=dc
</ulink>
</para>
- </sect1>
+ </sect1>
- <sect1 id="tutorial-oai-sru-zebra-indexess">
- <title>Investigating the content of the indexes</title>
+ <sect1 id="tutorial-oai-sru-zebra-indexes">
+ <title>Investigating the content of the indexes</title>
<para>
- How doess the magic work? What is inside the indexes? Why is a certain
- record foound by a search, and another not?. The answer is in the
- inverterd indexes. You can easily investigate them using the
+ How does the magic work? What is inside the indexes? Why is a certain
+ record found by a search, and another not?. The answer is in the
+ inverted indexes. You can easily investigate them using the
special &zebra; schema
<literal>zebra::index::fieldname</literal>. In this example you
- can see that the <literal>dc_title</literal> index has both word
+ can see that the <literal>title</literal> index has both word
(type <literal>:w</literal>) and phrase (type
<literal>:p</literal>)
indexed fields,
- <ulink url="http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=the&startRecord=1&maximumRecords=1&recordSchema=zebra::index::dc_title">
- http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=the&startRecord=1&maximumRecords=1&recordSchema=zebra::index::dc_title
+ <ulink url="http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=the&startRecord=1&maximumRecords=1&recordSchema=zebra::index::title">
+ http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=the&startRecord=1&maximumRecords=1&recordSchema=zebra::index::title
</ulink>
</para>
<para>
But where in the indexes did the term match for the query occur?
Easily answered with the special &zebra; schema
- <literal>zebra::snippet</literal>. The matching terma are
+ <literal>zebra::snippet</literal>. The matching terms are
encapsulated by <literal><s></literal> tags.
<ulink url="http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=the&startRecord=1&maximumRecords=1&recordSchema=zebra::snippet">
http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=the&startRecord=1&maximumRecords=1&recordSchema=zebra::snippet
found inside my hit set? Try the special &zebra; schema
<literal>zebra::facet::fieldname:type</literal>. In this case, we
investigate additional search terms for the
- <literal>dc_title:w</literal> index.
- <ulink url="http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=the&startRecord=1&maximumRecords=1&recordSchema=zebra::facet::dc_title:w">
- http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=the&startRecord=1&maximumRecords=1&recordSchema=zebra::facet::dc_title:w
+ <literal>title:w</literal> index.
+ <ulink url="http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=the&startRecord=1&maximumRecords=1&recordSchema=zebra::facet::title:w">
+ http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=the&startRecord=1&maximumRecords=1&recordSchema=zebra::facet::title:w
</ulink>
</para>
One can ask for multiple facets. Here, we want them from phrase
indexes of type
<literal>:p</literal>.
- <ulink url="http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=the&startRecord=1&maximumRecords=1&recordSchema=zebra::facet::dc_publisher:p,dc_title:p">
- http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=the&startRecord=1&maximumRecords=1&recordSchema=zebra::facet::dc_publisher:p,dc_title:p
+ <ulink url="http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=the&startRecord=1&maximumRecords=1&recordSchema=zebra::facet::publisher:p,title:p">
+ http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=the&startRecord=1&maximumRecords=1&recordSchema=zebra::facet::publisher:p,title:p
</ulink>
</para>
- </sect1>
+ </sect1>
- <sect1 id="tutorial-oai-sru-yazfrontend">
- <title>Setting up a correct &acro.sru; web service</title>
+ <sect1 id="tutorial-oai-sru-yazfrontend">
+ <title>Setting up a correct &acro.sru; web service</title>
<para>
- The &acro.sru; specification mandates that the &acro.cql; query
- language is supported and properly configure. Also, the server
- needs to be able to emmit a proper &acro.explain; &acro.xml;
- record, which is used to determine the capabilities of the
- specific server instance.
- </para>
+ The &acro.sru; specification mandates that the &acro.cql; query
+ language is supported and properly configure. Also, the server
+ needs to be able to emit a proper &acro.explain; &acro.xml;
+ record, which is used to determine the capabilities of the
+ specific server instance.
+ </para>
<para>
- In this example configuration we expoit the similarities between
+ In this example configuration we exploit the similarities between
the &acro.explain; record and the &acro.cql; query language
configuration, we generate the later from the former using an
&acro.xslt; transformation.
</para>
<para>
- The we are all set to start the &acro.sru;/acro.z3950; server including
+ We are all set to start the &acro.sru;/acro.z3950; server including
&acro.pqf; and &acro.cql; query configuration. It uses the &yaz; frontend
server configuration - just type
<screen>
zebrasrv -f conf/yazserver.xml
- </screen>
- </para>
+ </screen>
+ </para>
<para>
First, we'd like to be sure that we can see the &acro.explain;
<para>
Now we can issue true &acro.sru; requests. For example,
<literal>dc.title=the
- and dc.description=fish</literal> results in the following page
+ and dc.description=fish</literal> results in the following page
<ulink
- url="http://localhost:9999/?version=1.1&operation=searchRetrieve&query=dc.title=the
- and dc.description=fish
- &startRecord=1&maximumRecords=1&recordSchema=dc">
+ url="http://localhost:9999/?version=1.1&operation=searchRetrieve&query=dc.title=the
+ and dc.description=fish
+ &startRecord=1&maximumRecords=1&recordSchema=dc">
http://localhost:9999/?version=1.1&operation=searchRetrieve&query=dc.title=the
and dc.description=fish &startRecord=1&maximumRecords=1&recordSchema=dc
</ulink>
scanning the <literal>dc.title</literal> index gives us an idea
what search terms are found there
<ulink
- url="http://localhost:9999/?version=1.1&operation=scan&scanClause=dc.title=fish">
+ url="http://localhost:9999/?version=1.1&operation=scan&scanClause=dc.title=fish">
http://localhost:9999/?version=1.1&operation=scan&scanClause=dc.title=fish
</ulink>,
whereas
- <ulink
- url="http://localhost:9999/?version=1.1&operation=scan&scanClause=dc.identifier=fish">
-http://localhost:9999/?version=1.1&operation=scan&scanClause=dc.identifier=fish
- </ulink>
- accesses the indexed indentifiers.
+ <ulink
+ url="http://localhost:9999/?version=1.1&operation=scan&scanClause=dc.identifier=fish">
+ http://localhost:9999/?version=1.1&operation=scan&scanClause=dc.identifier=fish
+ </ulink>
+ accesses the indexed identifiers.
</para>
<para>
- In addition, all &zebra; internal special elemen sets or record
+ In addition, all &zebra; internal special element sets or record
schema's of the form
<literal>zebra::</literal> just work right out of the box
<ulink
- url="http://localhost:9999/?version=1.1&operation=searchRetrieve&query=dc.title=the
- and dc.description=fish
- &startRecord=1&maximumRecords=1&recordSchema=zebra::snippet">
+ url="http://localhost:9999/?version=1.1&operation=searchRetrieve&query=dc.title=the
+ and dc.description=fish
+ &startRecord=1&maximumRecords=1&recordSchema=zebra::snippet">
http://localhost:9999/?version=1.1&operation=searchRetrieve&query=dc.title=the
and dc.description=fish &startRecord=1&maximumRecords=1&recordSchema=zebra::snippet
</ulink>
- </sect1>
+ </sect1>
<sect1 id="tutorial-oai-z3950">
<title>Searching the &acro.oai; database by &acro.z3950; protocol</title>
-
+
<para>
In this section we repeat the searches and presents we have done so
far using the binary &acro.z3950; protocol, you can use any
</para>
<para>
Connecting to the server is done by the command
- <screen>
+ <screen>
yaz-client localhost:9999
</screen>
</para>
Z> elements zebra::facet::any:w
Z> show 1+1
- Z> elements zebra::facet::dc_publisher:p,dc_title:p
+ Z> elements zebra::facet::publisher:p,title:p
Z> show 1+1
- </screen>
+ </screen>
</para>
<para>
Z> find @attr 1=oai_setspec @attr 4=3 7374617475733D756E707562
Z> show 1+1
- Z> find @attr 1=dc_title communication
+ Z> find @attr 1=title communication
Z> show 1+1
- Z> find @attr 1=dc_identifier @attr 4=3
+ Z> find @attr 1=identifier @attr 4=3
http://resolver.caltech.edu/CaltechCSTR:1986.5228-tr-86
Z> show 1+1
</screen>
- etc, etc.
+ etc, etc.
</para>
<para>
Z> scan @attr 1=oai_datestamp @attr 4=3 1
Z> scan @attr 1=oai_setspec @attr 4=3 2000
Z>
- Z> scan @attr 1=dc_title communication
- Z> scan @attr 1=dc_identifier @attr 4=3 a
- </screen>
+ Z> scan @attr 1=title communication
+ Z> scan @attr 1=identifier @attr 4=3 a
+ </screen>
</para>
<para>
&acro.z3950; search using server-side CQL conversion:
<screen>
- Z> format xml
- Z> querytype cql
- Z> elements dc
- Z>
- Z> find harry
- Z>
- Z> find dc.creator = the
- Z> find dc.creator = the
- Z> find dc.title = the
- Z>
- Z> find dc.description < the
- Z> find dc.title > some
- Z>
- Z> find dc.identifier="http://resolver.caltech.edu/CaltechCSTR:1978.2276-tr-78"
- Z> find dc.relation = something
- </screen>
+ Z> format xml
+ Z> querytype cql
+ Z> elements dc
+ Z>
+ Z> find harry
+ Z>
+ Z> find dc.creator = the
+ Z> find dc.creator = the
+ Z> find dc.title = the
+ Z>
+ Z> find dc.description < the
+ Z> find dc.title > some
+ Z>
+ Z> find dc.identifier="http://resolver.caltech.edu/CaltechCSTR:1978.2276-tr-78"
+ Z> find dc.relation = something
+ </screen>
</para>
<!--
etc, etc. Notice that all indexes defined by 'type="0"' in the
indexing style sheet must be searched using the 'eq'
relation.
-
+
Z> find title <> and
fails as well. ???
-->
<tip>
- <para>
- &acro.z3950; scan using server side CQL conversion -
- unfortunately, this will _never_ work as it is not supported by the
- &acro.z3950; standard.
- If you want to use scan using server side CQL conversion, you need to
- make an SRW connection using yaz-client, or a
- SRU connection using REST Web Services - any browser will do.
- </para>
+ <para>
+ &acro.z3950; scan using server side CQL conversion -
+ unfortunately, this will _never_ work as it is not supported by the
+ &acro.z3950; standard.
+ If you want to use scan using server side CQL conversion, you need to
+ make an SRW connection using yaz-client, or a
+ SRU connection using REST Web Services - any browser will do.
+ </para>
</tip>
<tip>
- <para>
- All indexes defined by 'type="0"' in the
- indexing style sheet must be searched using the '@attr 4=3'
- structure attribute instruction.
- </para>
+ <para>
+ All indexes defined by 'type="0"' in the
+ indexing style sheet must be searched using the '@attr 4=3'
+ structure attribute instruction.
+ </para>
</tip>
<para>
- Notice that searching and scan on indexes
- <literal>dc_contributor</literal>, <literal>dc_language</literal>,
- <literal>dc_rights</literal>, and <literal>dc_source</literal>
- might fail, simply because none of the records in the small example set
- have these fields set, and consequently, these indexes might not
- been created.
+ Notice that searching and scan on indexes
+ <literal>contributor</literal>, <literal>language</literal>,
+ <literal>rights</literal>, and <literal>source</literal>
+ might fail, simply because none of the records in the small example set
+ have these fields set, and consequently, these indexes might not
+ been created.
</para>
- </sect1>
-
-
-
-
-
+ </sect1>
+
+ </chapter>
-
-</chapter>
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