<!ENTITY % idcommon SYSTEM "common/common.ent">
%idcommon;
]>
-<!-- $Id: pazpar2_conf.xml,v 1.26 2007-06-06 12:02:48 marc Exp $ -->
+<!-- $Id: pazpar2_conf.xml,v 1.27 2007-06-22 13:18:23 adam Exp $ -->
<refentry id="pazpar2_conf">
<refentryinfo>
<productname>Pazpar2</productname>
</refsynopsisdiv>
<refsect1><title>DESCRIPTION</title>
- <para>
- The pazpar2 configuration file, together with any referenced XSLT files,
- govern pazpar2's behavior as a client, and control the normalization and
- extraction of data elements from incoming result records, for the
- purposes of merging, sorting, facet analysis, and display.
- </para>
-
- <para>
- The file is specified using the option -f on the pazpar2 command line.
- There is not presently a way to reload the configuration file without
- restarting pazpar2, although this will most likely be added some time
- in the future.
- </para>
+ <para>
+ The Pazpar2 configuration file, together with any referenced XSLT files,
+ govern Pazpar2's behavior as a client, and control the normalization and
+ extraction of data elements from incoming result records, for the
+ purposes of merging, sorting, facet analysis, and display.
+ </para>
+
+ <para>
+ The file is specified using the option -f on the Pazpar2 command line.
+ There is not presently a way to reload the configuration file without
+ restarting Pazpar2, although this will most likely be added some time
+ in the future.
+ </para>
</refsect1>
-
+
<refsect1><title>FORMAT</title>
+ <para>
+ The configuration file is XML-structured. It must be valid XML. All
+ elements specific to Pazpar2 should belong to the namespace
+ <literal>http://www.indexdata.com/pazpar2/1.0</literal>
+ (this is assumed in the
+ following examples). The root element is named <literal>pazpar2</literal>.
+ Under the root element are a number of elements which group categories of
+ information. The categories are described below.
+ </para>
+
+ <refsect2 id="config-server"><title>server</title>
<para>
- The configuration file is XML-structured. It must be valid XML. All
- elements specific to pazpar2 should belong to the namespace
- "http://www.indexdata.com/pazpar2/1.0" (this is assumed in the
- following examples). The root element is named 'pazpar2'. Under the
- root element are a number of elements which group categories of
- information. The categories are described below.
- </para>
-
- <refsect2 id="config-server"><title>server</title>
+ This section governs overall behavior of the client. The data
+ elements are described below.
+ </para>
+ <variablelist> <!-- level 1 -->
+ <varlistentry>
+ <term>listen</term>
+ <listitem>
+ <para>
+ Configures the webservice -- this controls how you can connect
+ to Pazpar2 from your browser or server-side code. The
+ attributes 'host' and 'port' control the binding of the
+ server. The 'host' attribute can be used to bind the server to
+ a secondary IP address of your system, enabling you to run
+ Pazpar2 on port 80 alongside a conventional web server. You
+ can override this setting on the command line using the option -h.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>proxy</term>
+ <listitem>
+ <para>
+ If this item is given, Pazpar2 will forward all incoming HTTP
+ requests that do not contain the filename 'search.pz2' to the
+ host and port specified using the 'host' and 'port'
+ attributes. The 'myurl' attribute is required, and should provide
+ the base URL of the server. Generally, the HTTP URL for the host
+ specified in the 'listen' parameter. This functionality is
+ crucial if you wish to use
+ Pazpar2 in conjunction with browser-based code (JS, Flash,
+ applets, etc.) which operates in a security sandbox. Such code
+ can only connect to the same server from which the enclosing
+ HTML page originated. Pazpar2s proxy functionality enables you
+ to host all of the main pages (plus images, CSS, etc) of your
+ application on a conventional webserver, while efficiently
+ processing webservice requests for metasearch status, results,
+ etc.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>icu_chain</term>
+ <listitem>
+ <para>
+ Definition of ICU tokenization and normalization rules
+ are used if ICU support is compiled in. The 'id'
+ attribute is currently not used, and the 'locale'
+ attribute must be set to one of the locale strings
+ defined in ICU. The child elements listed below can be
+ in any order, except the 'index' element which logically
+ belongs to the end of the list. The stated tokenization,
+ normalization and charmapping instructions are performed
+ in order from top to bottom.
+ </para>
+ <variablelist> <!-- Level 2 -->
+ <varlistentry><term>casemap</term>
+ <listitem>
+ <para>
+ The attribute 'rule' defines the direction of the
+ per-character casemapping, allowed values are "l"
+ (lower), "u" (upper), "t" (title).
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry><term>normalize</term>
+ <listitem>
+ <para>
+ Normalization and transformation of tokens follows
+ the rules defined in the 'rule' attribute. For
+ possible values we refer to the extensive ICU
+ documentation found at the
+ <ulink url="&url.icu.transform;">ICU
+ transformation</ulink> home page. Set filtering
+ principles are explained at the
+ <ulink url="&url.icu.unicode.set;">ICU set and
+ filtering</ulink> page.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry><term>tokenize</term>
+ <listitem>
+ <para>
+ Tokenization is the only rule in the ICU chain
+ which splits one token into multiple tokens. The
+ 'rule' attribute may have the following values:
+ "s" (sentence), "l" (line-break), "w" (word), and
+ "c" (character), the later probably not being
+ very useful in a pruning Pazpar2 installation.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry><term>index</term>
+ <listitem>
+ <para>
+ Finally the 'index' element instruction - without
+ any 'rule' attribute - is used to store the tokens
+ after chain processing in the relevance ranking
+ unit of Pazpar2. It will always be the last
+ instruction in the chain.
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>service</term>
+ <listitem>
<para>
- This section governs overall behavior of the client. The data
- elements are described below.
+ This nested element controls the behavior of Pazpar2 with
+ respect to your data model. In Pazpar2, incoming records are
+ normalized, using XSLT, into an internal representation.
+ The 'service' section controls the further processing and
+ extraction of data from the internal representation, primarily
+ through the 'metadata' sub-element.
</para>
- <variablelist> <!-- level 1 -->
- <varlistentry>
- <term>listen</term>
- <listitem>
+
+ <variablelist> <!-- Level 2 -->
+ <varlistentry><term>metadata</term>
+ <listitem>
+ <para>
+ One of these elements is required for every data element in
+ the internal representation of the record (see
+ <xref linkend="data_model"/>. It governs
+ subsequent processing as pertains to sorting, relevance
+ ranking, merging, and display of data elements. It supports
+ the following attributes:
+ </para>
+
+ <variablelist> <!-- level 3 -->
+ <varlistentry><term>name</term>
+ <listitem>
<para>
- Configures the webservice -- this controls how you can connect
- to pazpar2 from your browser or server-side code. The
- attributes 'host' and 'port' control the binding of the
- server. The 'host' attribute can be used to bind the server to
- a secondary IP address of your system, enabling you to run
- pazpar2 on port 80 alongside a conventional web server. You
- can override this setting on the command lineusing the option -h.
+ This is the name of the data element. It is matched
+ against the 'type' attribute of the
+ 'metadata' element
+ in the normalized record. A warning is produced if
+ metadata elements with an unknown name are
+ found in the
+ normalized record. This name is also used to
+ represent
+ data elements in the records returned by the
+ webservice API, and to name sort lists and browse
+ facets.
</para>
- </listitem>
- </varlistentry>
-
- <varlistentry>
- <term>proxy</term>
- <listitem>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry><term>type</term>
+ <listitem>
<para>
- If this item is given, pazpar2 will forward all incoming HTTP
- requests that do not contain the filename 'search.pz2' to the
- host and port specified using the 'host' and 'port'
- attributes. The 'myurl' attribute is required, and should provide
- the base URL of the server. Generally, the HTTP URL for the host
- specified in the 'listen' parameter. This functionality is
- crucial if you wish to use
- pazpar2 in conjunction with browser-based code (JS, Flash,
- applets, etc.) which operates in a security sandbox. Such code
- can only connect to the same server from which the enclosing
- HTML page originated. Pazpar2s proxy functionality enables you
- to host all of the main pages (plus images, CSS, etc) of your
- application on a conventional webserver, while efficiently
- processing webservice requests for metasearch status, results,
- etc.
+ The type of data element. This value governs any
+ normalization or special processing that might take
+ place on an element. Possible values are 'generic'
+ (basic string), 'year' (a range is computed if
+ multiple years are found in the record). Note: This
+ list is likely to increase in the future.
</para>
- </listitem>
- </varlistentry>
-
- <varlistentry>
- <term>icu_chain</term>
- <listitem>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry><term>brief</term>
+ <listitem>
<para>
- Definition of ICU tokenization and normalization rules
- are used if ICU support is compiled in. The 'id'
- attribute is currently not used, and the 'locale'
- attribute must be set to one of the locale strings
- defined in ICU. The child elements listed below can be
- in any order, except the 'index' element which logically
- belongs to the end of the list. The stated tokenization,
- normalization and charmapping instructions are performed
- in order from top to bottom.
+ If this is set to 'yes', then the data element is
+ includes in brief records in the webservice API. Note
+ that this only makes sense for metadata elements that
+ are merged (see below). The default value is 'no'.
</para>
- <variablelist> <!-- Level 2 -->
- <varlistentry><term>casemap</term>
- <listitem>
- <para>
- The attribure 'rule' defines the direction of the
- per-character casemapping, allowed values are "l"
- (lower), "u" (upper), "t" (title).
- </para>
- </listitem>
- </varlistentry>
- <varlistentry><term>normalize</term>
- <listitem>
- <para>
- Normalization and transformation of tokens follows
- the rules defined in the 'rule' attribute. For
- possible values we refer to the extensive ICU
- documentation found at the
- <ulink url="&url.icu.transform;">ICU
- transformation</ulink> home page. Set filtering
- principles are explained at the
- <ulink url="&url.icu.unicode.set;">ICU set and
- filtering</ulink> page.
- </para>
- </listitem>
- </varlistentry>
- <varlistentry><term>tokenize</term>
- <listitem>
- <para>
- Tokenization is the only rule in the ICU chain
- which splits one token into multiple tokens. The
- 'rule' attribute may have the following values:
- "s" (sentence), "l" (line-break), "w" (word), and
- "c" (character), the later probably not beeing
- very useful in a runing pazpar2 installation.
- </para>
- </listitem>
- </varlistentry>
- <varlistentry><term>index</term>
- <listitem>
- <para>
- Finally the 'index' element instruction - without
- any 'rule' attribute - is used to store the tokens
- after chain processing in the relevance ranking
- unit of Pazpar2. It will always be the last
- instruction in the chain.
- </para>
- </listitem>
- </varlistentry>
- </variablelist>
- </listitem>
- </varlistentry>
-
- <varlistentry>
- <term>service</term>
- <listitem>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry><term>sortkey</term>
+ <listitem>
<para>
- This nested element controls the behavior of pazpar2 with
- respect to your data model. In pazpar2, incoming records are
- normalized, using XSLT, into an internal representation.
- The 'service' section controls the further processing and
- extraction of data from the internal representation, primarily
- through the 'metdata' sub-element.
+ Specifies that this data element is to be used for
+ sorting. The possible values are 'numeric' (numeric
+ value), 'skiparticle' (string; skip common, leading
+ articles), and 'no' (no sorting). The default value is
+ 'no'.
</para>
-
- <variablelist> <!-- Level 2 -->
- <varlistentry><term>metadata</term>
- <listitem>
- <para>
- One of these elements is required for every data element in
- the internal representation of the record (see
- <xref linkend="data_model"/>. It governs
- subsequent processing as pertains to sorting, relevance
- ranking, merging, and display of data elements. It supports
- the following attributes:
- </para>
-
- <variablelist> <!-- level 3 -->
- <varlistentry><term>name</term>
- <listitem>
- <para>
- This is the name of the data element. It is matched
- against the 'type' attribute of the
- 'metadata' element
- in the normalized record. A warning is produced if
- metdata elements with an unknown name are
- found in the
- normalized record. This name is also used to
- represent
- data elements in the records returned by the
- webservice API, and to name sort lists and browse
- facets.
- </para>
- </listitem>
- </varlistentry>
-
- <varlistentry><term>type</term>
- <listitem>
- <para>
- The type of data element. This value governs any
- normalization or special processing that might take
- place on an element. Possible values are 'generic'
- (basic string), 'year' (a range is computed if
- multiple years are found in the record). Note: This
- list is likely to increase in the future.
- </para>
- </listitem>
- </varlistentry>
-
- <varlistentry><term>brief</term>
- <listitem>
- <para>
- If this is set to 'yes', then the data element is
- includes in brief records in the webservice API. Note
- that this only makes sense for metadata elements that
- are merged (see below). The default value is 'no'.
- </para>
- </listitem>
- </varlistentry>
-
- <varlistentry><term>sortkey</term>
- <listitem>
- <para>
- Specifies that this data element is to be used for
- sorting. The possible values are 'numeric' (numeric
- value), 'skiparticle' (string; skip common, leading
- articles), and 'no' (no sorting). The default value is
- 'no'.
- </para>
- </listitem>
- </varlistentry>
-
- <varlistentry><term>rank</term>
- <listitem>
- <para>
- Specifies that this element is to be used to
- help rank
- records against the user's query (when ranking is
- requested). The value is an integer, used as a
- multiplier against the basic TF*IDF score. A value of
- 1 is the base, higher values give additional
- weight to
- elements of this type. The default is '0', which
- excludes this element from the rank calculation.
- </para>
- </listitem>
- </varlistentry>
-
- <varlistentry><term>termlist</term>
- <listitem>
- <para>
- Specifies that this element is to be used as a
- termlist, or browse facet. Values are tabulated from
- incoming records, and a highscore of values (with
- their associated frequency) is made available to the
- client through the webservice API.
- The possible values
- are 'yes' and 'no' (default).
- </para>
- </listitem>
- </varlistentry>
-
- <varlistentry><term>merge</term>
- <listitem>
- <para>
- This governs whether, and how elements are extracted
- from individual records and merged into cluster
- records. The possible values are: 'unique' (include
- all unique elements), 'longest' (include only the
- longest element (strlen), 'range' (calculate a range
- of values across al matching records), 'all' (include
- all elements), or 'no' (don't merge; this is the
+ </listitem>
+ </varlistentry>
+
+ <varlistentry><term>rank</term>
+ <listitem>
+ <para>
+ Specifies that this element is to be used to
+ help rank
+ records against the user's query (when ranking is
+ requested). The value is an integer, used as a
+ multiplier against the basic TF*IDF score. A value of
+ 1 is the base, higher values give additional
+ weight to
+ elements of this type. The default is '0', which
+ excludes this element from the rank calculation.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry><term>termlist</term>
+ <listitem>
+ <para>
+ Specifies that this element is to be used as a
+ termlist, or browse facet. Values are tabulated from
+ incoming records, and a highscore of values (with
+ their associated frequency) is made available to the
+ client through the webservice API.
+ The possible values
+ are 'yes' and 'no' (default).
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry><term>merge</term>
+ <listitem>
+ <para>
+ This governs whether, and how elements are extracted
+ from individual records and merged into cluster
+ records. The possible values are: 'unique' (include
+ all unique elements), 'longest' (include only the
+ longest element (strlen), 'range' (calculate a range
+ of values across all matching records), 'all' (include
+ all elements), or 'no' (don't merge; this is the
default);
- </para>
- </listitem>
- </varlistentry>
- </variablelist> <!-- attributes to metadata -->
-
- </listitem>
- </varlistentry>
- </variablelist> <!-- Data elements in service directive -->
- </listitem>
- </varlistentry>
- </variablelist> <!-- Data elements in server directive -->
- </refsect2>
-
- </refsect1>
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist> <!-- attributes to metadata -->
+
+ </listitem>
+ </varlistentry>
+ </variablelist> <!-- Data elements in service directive -->
+ </listitem>
+ </varlistentry>
+ </variablelist> <!-- Data elements in server directive -->
+ </refsect2>
+
+ </refsect1>
<refsect1><title>EXAMPLE</title>
<para>Below is a working example configuration:
</pazpar2>
]]></screen>
- </para>
+ </para>
</refsect1>
-
+
<refsect1 id="target_settings"><title>TARGET SETTINGS</title>
+ <para>
+ Pazpar2 features a cunning scheme by which you can associate various
+ kinds of attributes, or settings with search targets. This can be done
+ through XML files which are read at startup; each file can associate
+ one or more settings with one or more targets. The file format is generic
+ in nature, designed to support a wide range of application requirements. The
+ settings can be purely technical things, like, how to perform a title
+ search against a given target, or it can associate arbitrary name=value
+ pairs with groups of targets -- for instance, if you would like to
+ place all commercial full-text bases in one group for selection
+ purposes, or you would like to control what targets are accessible
+ to users by default.
+ </para>
+
+ <para>
+ During startup, Pazpar2 will recursively read a specified directory
+ (can be identified in the pazpar2.cfg file or on the command line), and
+ process any settings files found therein.
+ </para>
+
+ <para>
+ Clients of the Pazpar2 webservice interface can selectively override
+ settings for individual targets within the scope of one session. This
+ can be used in conjunction with an external authentication system to
+ determine which resources are to be accessible to which users. Pazpar2
+ itself has no notion of end-users, and so can be used in conjunction
+ with any type of authentication system. Similarly, the authentication
+ tokens submitted to access-controlled search targets can similarly be
+ overridden, to allow use of Pazpar2 in a consortial or multi-library
+ environment, where different end-users may need to be represented to
+ some search targets in different ways. This, again, can be managed
+ using an external database or other lookup mechanism. Setting overrides
+ can be performed either using the 'init' or the 'settings' webservice
+ command.
+ </para>
+
+ <para>
+ In fact, every setting that applies to a database (except pz:id, which
+ can only be used for filtering targets to use for a search) can be overridden
+ on a per-session basis. This allows the client to override specific CCL fields
+ for searching, etc., to meet the needs of a session or user.
+ </para>
+
+ <para>
+ Finally, as an extreme case of this, the webservice client can
+ introduce entirely new targets, on the fly, as part of the init or
+ settings command. This is useful if you desire to manage information
+ about your search targets in a separate application such as a database.
+ You do not need any static settings file whatsoever to run Pazpar2 -- as
+ long as the webservice client is prepared to supply the necessary
+ information at the beginning of every session.
+ </para>
+
+ <note>
<para>
- Pazpar2 features a cunning scheme by which you can associate various
- kinds of attributes, or settings with search targets. This can be done
- through XML files which are read at startup; each file can associate
- one or more settings with one or more targets. The file format is generic
- in nature, designed to support a wide range of application requirements. The
- settings can be purely technical things, like, how to perform a title
- search against a given target, or it can associate arbitrary name=value
- pairs with groups of targets -- for instance, if you would like to
- place all commercial full-text bases in one group for selection
- purposes, or you would like to control what targets are accessible
- to users by default.
+ The following discussion of practical issues related to session and settings
+ management are cast in terms of a user interface based on Ajax/Javascript
+ technology. It would apply equally well to many other kinds of browser-based logic.
</para>
-
+ </note>
+
+ <para>
+ Typically, a Javascript client is not allowed to directly alter the parameters
+ of a session. There are two reasons for this. One has to do with access
+ to information; typically, information about a user will be stored in a
+ system on the server side, or it will be accessible in some way from the server.
+ However, since the Javascript client cannot be entirely trusted (some hostile
+ agent might in fact 'pretend' to be a regular ws client), it is more robust
+ to control session settings from scripting that you run as part of your
+ webserver. Typically, this can be handled during the session initialization,
+ as follows:
+ </para>
+
+ <para>
+ Step 1: The Javascript client loads, and asks the webserver for a new Pazpar2
+ session ID. This can be done using a Javascript call, for instance. Note that
+ it is possible to submit Ajax HTTPXmlRequest calls either to Pazpar2 or to the
+ webserver that Pazpar2 is proxying for. See (XXX Insert link to Pazpar2 protocol).
+ </para>
+
+ <para>
+ Step 2: Code on the webserver authenticates the user, by database lookup,
+ LDAP access, NCIP, etc. Determines which resources the user has access to,
+ and any user-specific parameters that are to be applied during this session.
+ </para>
+
+ <para>
+ Step 3: The webserver initializes a new Pazpar2 settings, and sets user-specific
+ parameters as necessary, using the init webservice command. A new session ID is
+ returned.
+ </para>
+
+ <para>
+ Step 4: The webserver returns this session ID to the Javascript client, which then
+ uses the session ID to submit searches, show results, etc.
+ </para>
+
+ <para>
+ Step 5: When the Javascript client ceases to use the session, Pazpar2 destroys
+ any session-specific information.
+ </para>
+
+ <refsect2><title>SETTINGS FILE FORMAT</title>
<para>
- During startup, pazpar2 will recursively read a specified directory
- (can be identified in the pazpar2.cfg file or on the command line), and
- process any settings files found therein.
+ Each file contains a root element named <settings>. It may
+ contain one or more <set> elements. The settings and set
+ elements may contain the following attributes. Attributes in the set node
+ overrides those in the setting root element. Each set node must
+ specify (directly, or inherited from the parent node) at least a
+ target, name, and value.
</para>
-
- <para>
- Clients of the pazpar2 webservice interface can selectively override
- settings for individual targets within the scope of one session. This
- can be used in conjunction with an external authentication system to
- determine which resources are to be accessible to which users. Pazpar2
- itself has no notion of end-users, and so can be used in conjunction
- with any type of authentication system. Similarly, the authentication
- tokens submitted to access-controlled search targets can similarly be
- overriden, to allow use of pazpar2 in a consortial or multi-library
- environment, where different end-users may need to be represented to
- some search targets in different ways. This, again, can be managed
- using an external database or other lookup mechanism. Setting overrides
- can be performed either using the 'init' or the 'settings' webservice
- command (see XXX ref to pazpar2 protocol).
- </para>
-
- <para>
- In fact, every setting that applies to a database (except pz:id, which
- can only be used for filtering targets to use for a search) can be overriden
- on a per-session basis. This allows the client to override specific CCL fields
- for searching, etc., to meet the needs of a session or user.
- </para>
-
- <para>
- Finally, as an extreme case of this, the webservice client can
- introduce entirely new targets, on the fly, as part of the init or
- settings command. This is useful if you desire to manage information
- about your search targets in a separate application such as a database.
- You do not need any static settings file whatsoever to run pazpar2 -- as
- long as the webservice client is prepared to supply the necessary
- information at the beginning of every session.
- </para>
-
- <para>
- NOTE: The following discussion of practical issues related to session and settings
- management are cast in terms of a user interface based on Ajax/Javascript
- technology. It would apply equally well to many other kinds of browser-based logic.
- </para>
-
- <para>
- Typically, a Javascript client is not allowed to directly alter the parameters
- of a session. There are two reasons for this. One has to do with access
- to information; typically, information about a user will be stored in a
- system on the server side, or it will be accessible in some way from the server.
- However, since the Javascript client cannot be entirely trusted (some hostile
- agent might in fact 'pretend' to be a regular ws client), it is more robust
- to control session sesttings from scripting that you run as part of your
- webserver. Typically, this can be handled during the session initialization,
- as follows:
- </para>
-
- <para>
- Step 1: The Javascript client loads, and asks the webserver for a new pazpar2
- session ID. This can be done using a Javascript call, for instance. Note that
- it is possible to submit Ajax HTTPXmlRequest calls either to pazpar2 or to the
- webserver that pazpar2 is proxying for. See (XXX Insert link to pazpar2 protocol).
- </para>
-
- <para>
- Step 2: Code on the webserver authenticates the user, by database lookup,
- LDAP access, NCIP, etc. Determines which resources the user has access to,
- and any user-specific parameters that are to be applied during this session.
- </para>
-
- <para>
- Step 3: The webserver initializes a new pazpar2 settings, and sets user-specific
- parameters as necessary, using the init webservice command. A new session ID is
- returned.
- </para>
-
- <para>
- Step 4: The webserver returns this session ID to the Javascript client, which then
- uses the session ID to submit searches, show results, etc.
- </para>
-
- <para>
- Step 5: When the Javascript client ceases to use the session, pazpar2 destroys
- any session-specific information.
- </para>
-
- <refsect2><title>SETTINGS FILE FORMAT</title>
- <para>
- Each file contains a root element named <settings>. It may
- contain one or more <set> elements. The settings and set
- elements may contain the following attributes. Attributes in the set node
- overrides those in the setting root element. Each set node must
- specify (directly, or inherited from the parent node) at least a
- target, name, and value.
- </para>
-
- <variablelist>
- <varlistentry>
- <term>target</term>
- <listitem>
- <para>
- This specifies the search target to which this setting should be
- applied. Targets are identified by their Z39.50 URL, generally
- including the host, port, and database name, (e.g.
- bagel.indexdata.com:210/marc). Two wildcard forms are accepted:
- * (asterisk) matches all known targets;
- bagel.indexdata.com:210/* matches all known databases on the given
- host.
- </para>
- <para>
- A precedence system determines what happens if there are
- overlapping values for the same setting name for the same
- target. A setting for a specific target name overrides a
- setting whch specifies target using a wildcard. This makes it
- easy to set defaults for all targets, and then override them
- for specific targets or hosts. If there are
- multiple overlapping settings with the same name and target
- value, the 'precedence' attribute determines what happens.
- </para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term>name</term>
- <listitem>
- <para>
- The name of the setting. This can be anything you like.
- However, pazpar2 reserves a number of setting names for
- specific purposes, all starting with 'pz:', and it is a good
- idea to avoid that prefix if you make up your own setting
- names. See below for a list of reserved variables.
- </para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term>value</term>
- <listitem>
- <para>
- The value of the setting. Generally, this can be anything you
- want -- however, some of the reserved settings may expect
- specific kinds of values.
- </para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term>precedence</term>
- <listitem>
- <para>
- This should be an integer. If not provided, the default value
- is 0. If two (or more) settings have the same content for
- target and name, the precedence value determines the outcome.
- If both settings have the same precedence value, they are both
- applied to the target(s). If one has a higher value, then the
- value of that setting is applied, and the other one is ignored.
- </para>
- </listitem>
- </varlistentry>
- </variablelist>
-
+
+ <variablelist>
+ <varlistentry>
+ <term>target</term>
+ <listitem>
<para>
- By setting defaults for target, name, or value in the root
- settings node, you can use the settings files in many different
- ways. For instance, you can use a single file to set defaults for
- many different settings, like search fields, retrieval syntaxes,
- etc. You can have one file per server, which groups settings for
- that server or target. You could also have one file which associates
- a number of targets with a given setting, for instance, to associate
- many databases with a given category or class that makes sense
- within your application.
+ This specifies the search target to which this setting should be
+ applied. Targets are identified by their Z39.50 URL, generally
+ including the host, port, and database name, (e.g.
+ <literal>bagel.indexdata.com:210/marc</literal>).
+ Two wildcard forms are accepted:
+ * (asterisk) matches all known targets;
+ <literal>bagel.indexdata.com:210/*</literal> matches all
+ known databases on the given host.
</para>
-
<para>
- The following examples illustrate uses of the settings system to
- associate settings with targets to meet different requirements.
+ A precedence system determines what happens if there are
+ overlapping values for the same setting name for the same
+ target. A setting for a specific target name overrides a
+ setting which specifies target using a wildcard. This makes it
+ easy to set defaults for all targets, and then override them
+ for specific targets or hosts. If there are
+ multiple overlapping settings with the same name and target
+ value, the 'precedence' attribute determines what happens.
</para>
-
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>name</term>
+ <listitem>
+ <para>
+ The name of the setting. This can be anything you like.
+ However, Pazpar2 reserves a number of setting names for
+ specific purposes, all starting with 'pz:', and it is a good
+ idea to avoid that prefix if you make up your own setting
+ names. See below for a list of reserved variables.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>value</term>
+ <listitem>
+ <para>
+ The value of the setting. Generally, this can be anything you
+ want -- however, some of the reserved settings may expect
+ specific kinds of values.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>precedence</term>
+ <listitem>
<para>
- The example below associates a set of default values that can be
- used across many targets. Note the wildcard for targets.
- This associates the given settings with all targets for which no
- other information is provided.
- <screen><![CDATA[
+ This should be an integer. If not provided, the default value
+ is 0. If two (or more) settings have the same content for
+ target and name, the precedence value determines the outcome.
+ If both settings have the same precedence value, they are both
+ applied to the target(s). If one has a higher value, then the
+ value of that setting is applied, and the other one is ignored.
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+
+ <para>
+ By setting defaults for target, name, or value in the root
+ settings node, you can use the settings files in many different
+ ways. For instance, you can use a single file to set defaults for
+ many different settings, like search fields, retrieval syntaxes,
+ etc. You can have one file per server, which groups settings for
+ that server or target. You could also have one file which associates
+ a number of targets with a given setting, for instance, to associate
+ many databases with a given category or class that makes sense
+ within your application.
+ </para>
+
+ <para>
+ The following examples illustrate uses of the settings system to
+ associate settings with targets to meet different requirements.
+ </para>
+
+ <para>
+ The example below associates a set of default values that can be
+ used across many targets. Note the wildcard for targets.
+ This associates the given settings with all targets for which no
+ other information is provided.
+ <screen><![CDATA[
<settings target="*">
<!-- This file introduces default settings for pazpar2 -->
- <!-- $Id: pazpar2_conf.xml,v 1.26 2007-06-06 12:02:48 marc Exp $ -->
+ <!-- $Id: pazpar2_conf.xml,v 1.27 2007-06-22 13:18:23 adam Exp $ -->
<!-- mapping for unqualified search -->
<set name="pz:cclmap:term" value="u=1016 t=l,r s=al"/>
</settings>
]]></screen>
- </para>
-
- <para>
- The next example shows certain settings overriden for one target,
- one which returns XML records containing DublinCore elements, and
- which furthermore requires a username/password.
- <screen><![CDATA[
+ </para>
+
+ <para>
+ The next example shows certain settings overridden for one target,
+ one which returns XML records containing DublinCore elements, and
+ which furthermore requires a username/password.
+ <screen><![CDATA[
<settings target="funkytarget.com:210/db1">
<set name="pz:requestsyntax" value="xml"/>
<set name="pz:nativesyntax" value="xml"/>
<set name="pz:authentication" value="myuser/password"/>
</settings>
]]></screen>
- </para>
-
- <para>
- The following example associates a specific name/value combination
- with a number of targets. The targets below are access-restricted,
- and can only be used by users with special credentials.
- <screen><![CDATA[
+ </para>
+
+ <para>
+ The following example associates a specific name/value combination
+ with a number of targets. The targets below are access-restricted,
+ and can only be used by users with special credentials.
+ <screen><![CDATA[
<settings name="pz:allow" value="0">
<set target="funkytarget.com:210/*"/>
<set target="commercial.com:2100/expensiveDb"/>
</settings>
]]></screen>
+ </para>
+
+ </refsect2>
+
+ <refsect2><title>RESERVED SETTING NAMES</title>
+ <para>
+ The following setting names are reserved by Pazpar2 to control the
+ behavior of the client function.
+ </para>
+
+ <variablelist>
+ <varlistentry>
+ <term>pz:cclmap:xxx</term>
+ <listitem>
+ <para>
+ This establishes a CCL field definition or other setting, for
+ the purpose of mapping end-user queries. XXX is the field or
+ setting name, and the value of the setting provides parameters
+ (e.g. parameters to send to the server, etc.). Please consult
+ the YAZ manual for a full overview of the many capabilities of
+ the powerful and flexible CCL parser.
</para>
-
- </refsect2>
-
- <refsect2><title>RESERVED SETTING NAMES</title>
<para>
- The following setting names are reserved by pazpar2 to control the
- behavior of the client function.
+ Note that it is easy to establish a set of default parameters,
+ and then override them individually for a given target.
</para>
-
- <variablelist>
- <varlistentry>
- <term>pz:cclmap:xxx</term>
- <listitem>
- <para>
- This establishes a CCL field definition or other setting, for
- the purpose of mapping end-user queries. XXX is the field or
- setting name, and the value of the setting provides parameters
- (e.g. parameters to send to the server, etc.). Please consult
- the YAZ manual for a full overview of the many capabilities of
- the powerful and flexible CCL parser.
- </para>
- <para>
- Note that it is easy to etablish a set of default parameters,
- and then override them individually for a given target.
- </para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term>pz:requestsyntax</term>
- <listitem>
- <para>
- This specifies the record syntax to use when requesting
- records from a given server. The value can be a symbolic name like
- marc21 or xml, or it can be a Z39.50-style dot-separated OID.
- </para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term>pz:elements</term>
- <listitem>
- <para>
- The element set name to be used when retrieving records from a
- server (not yet implemented).
- </para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term>pz:piggyback</term>
- <listitem>
- <para>
- Piggybacking enables the server to retrieve records from the
- server as part of the search response in Z39.50. Almost all
- servers support this (or fail it gracefully), but a few
- servers will produce undesirable results.
- Set to '1' to enable piggybacking, '0' to disable it. Default
- is 1 (piggybacking enabled).
- </para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term>pz:nativesyntax</term>
- <listitem>
- <para>
- The representation (syntax) of the retrieval records. Currently
- recognized values are iso2709 and xml.
- </para>
- <para>
- For iso2709, can also specify a native character set, e.g. "iso2709;latin-1".
- If no character set is provided, MARC-8 is assumed.
- </para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term>pz:xslt</term>
- <listitem>
- <para>
- Provides the path of an XSLT stylesheet which will be used to
- map incoming records to the internal representation.
- </para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term>pz:authentication</term>
- <listitem>
- <para>
- Sets an authentication string for a given server. See the section on
- authorization and authentication for discussion.
- </para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term>pz:allow</term>
- <listitem>
- <para>
- Allows or denies access to the resources it is applied to. Possible
- values are '0' and '1'. The default is '1' (allow access to this resource).
- See the manual section on authorization and authentication for discussion
- about how to use this setting.
- </para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term>pz:maxrecs</term>
- <listitem>
- <para>
- Controls the maximum number of records to be retrieved from a
- server. The default is 100 (not yet implemented).
- </para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term>pz:id</term>
- <listitem>
- <para>
- This setting can't be 'set' -- it contains the ID (normally
- ZURL) for a given target, and is useful for filtering --
- specifically when you want to select one or more specific
- targets in the search command.
- </para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term>pz:zproxy</term>
- <listitem>
- <para>
- The 'pz:zproxy' setting has the value syntax
- 'host.internet.adress:port', it is used to tunnel Z39.50
- requests through the named Z39.50 proxy.
- </para>
- </listitem>
- </varlistentry>
- </variablelist>
- </refsect2>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>pz:requestsyntax</term>
+ <listitem>
+ <para>
+ This specifies the record syntax to use when requesting
+ records from a given server. The value can be a symbolic name like
+ marc21 or xml, or it can be a Z39.50-style dot-separated OID.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>pz:elements</term>
+ <listitem>
+ <para>
+ The element set name to be used when retrieving records from a
+ server (not yet implemented).
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>pz:piggyback</term>
+ <listitem>
+ <para>
+ Piggybacking enables the server to retrieve records from the
+ server as part of the search response in Z39.50. Almost all
+ servers support this (or fail it gracefully), but a few
+ servers will produce undesirable results.
+ Set to '1' to enable piggybacking, '0' to disable it. Default
+ is 1 (piggybacking enabled).
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>pz:nativesyntax</term>
+ <listitem>
+ <para>
+ The representation (syntax) of the retrieval records. Currently
+ recognized values are iso2709 and xml.
+ </para>
+ <para>
+ For iso2709, can also specify a native character set, e.g. "iso2709;latin-1".
+ If no character set is provided, MARC-8 is assumed.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>pz:xslt</term>
+ <listitem>
+ <para>
+ Provides the path of an XSLT stylesheet which will be used to
+ map incoming records to the internal representation.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>pz:authentication</term>
+ <listitem>
+ <para>
+ Sets an authentication string for a given server. See the section on
+ authorization and authentication for discussion.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>pz:allow</term>
+ <listitem>
+ <para>
+ Allows or denies access to the resources it is applied to. Possible
+ values are '0' and '1'. The default is '1' (allow access to this resource).
+ See the manual section on authorization and authentication for discussion
+ about how to use this setting.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>pz:maxrecs</term>
+ <listitem>
+ <para>
+ Controls the maximum number of records to be retrieved from a
+ server. The default is 100 (not yet implemented).
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>pz:id</term>
+ <listitem>
+ <para>
+ This setting can't be 'set' -- it contains the ID (normally
+ ZURL) for a given target, and is useful for filtering --
+ specifically when you want to select one or more specific
+ targets in the search command.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>pz:zproxy</term>
+ <listitem>
+ <para>
+ The 'pz:zproxy' setting has the value syntax
+ 'host.internet.adress:port', it is used to tunnel Z39.50
+ requests through the named Z39.50 proxy.
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect2>
</refsect1>
</refentry>
projects / pazpar2-moved-to-github.git / commitdiff