X-Git-Url: http://lists.indexdata.com/cgi-bin?a=blobdiff_plain;f=doc%2Fpazpar2_protocol.xml;h=e227354dfbed8e047f876bae6ec5863cb8dbb4ef;hb=6110a4dcdf8f269968c6a30792f47dacba3929b6;hp=a622601e83f3eea0fb24f3ef02504a216ff095f6;hpb=8f811d796c8d84b1bfb932bbbd8580a70a0c1b4d;p=pazpar2-moved-to-github.git
diff --git a/doc/pazpar2_protocol.xml b/doc/pazpar2_protocol.xml
index a622601..e227354 100644
--- a/doc/pazpar2_protocol.xml
+++ b/doc/pazpar2_protocol.xml
@@ -1,6 +1,6 @@
-
%local;
@@ -13,10 +13,12 @@
Pazpar2&version;
+ Index DataPazpar2 protocol7
+ Conventions and miscellaneous
@@ -24,7 +26,8 @@
The webservice protocol of Pazpar2
- DESCRIPTION
+
+ DESCRIPTION
Webservice requests are any that refer to filename "search.pz2". Arguments
are GET-style parameters. Argument 'command' is always required and specifies
@@ -32,16 +35,33 @@
request is forwarded to the HTTP server specified in the configuration
using the proxy setting.
This way, a regular webserver can host the user interface (itself dynamic
- or static HTML), and AJAX-style calls can be used from JS (or any other client-based
- scripting environment) to interact with the search logic in Pazpar2.
+ or static HTML), and Ajax-style calls can be used from JS (or any other
+ client-based scripting environment) to interact with the search logic
+ in Pazpar2.
Each command is described in sub sections to follow.
- init
+
+ init
Initializes a session.
- Returns session ID to be used in subsequent requests.
+ Returns session ID to be used in subsequent requests. If
+ a server ID is given in the Pazpar2 server section, then a
+ that is included in the session ID as suffix after a period (.).
+
+
+ If the init command is performed as a HTTP GET request, service
+ and settings from local files are used. The service parameter
+ may chose a particular local service.
+
+
+ If the init command is performed as a HTTP POST request and
+ the content-type is text/xml, then the content is XML parsed
+ and treated as service for the session. The root element should be
+ service. Refer to descripton of the
+ service format.
+ The posting of a service appeared in Pazpar2 version 1.2.1.
Example:
@@ -59,9 +79,9 @@
]]>
- The init command may take a number of setting parameters, similar to
- the 'settings' command described below. These settings are immediately
- applied to the new session. Other parameters for init are:
+ The init command may take a number of setting parameters, similar to
+ the 'settings' command described below. These settings are immediately
+ applied to the new session. Other parameters for init are:
clear
@@ -78,9 +98,9 @@
service
- Makes the session use the service with the given ID. If
- this is setting is omitted, the session will use the
- unnamed service in the Pazpar2 configuration.
+ If this is defined it specifies a service ID. Makes the session use
+ the service with this ID. If this is setting is omitted, the
+ session will use the unnamed service in the Pazpar2 configuration.
@@ -88,7 +108,8 @@
- ping
+
+ ping
Keeps a session alive. An idle session will time out after one minute.
The ping command can be used to keep the session alive absent other
@@ -116,8 +137,10 @@
The settings command applies session-specific settings to one or more
databases. A typical function of this is to enable access to
restricted resources for registered users, or to set a user- or
- library-specific username/password to use against a target. Each
- setting parameter has the form name[target]=value, where name is the
+ library-specific username/password to use against a target.
+
+
+ Each setting parameter has the form name[target]=value, where name is the
name of the setting (e.g. pz:authentication), target is a target ID,
or possibly a wildcard, and value is the desired value for the
setting.
@@ -137,11 +160,19 @@
the init command.
-
+
+
+ If the settings command is performed as HTTP POST and the content-type
+ is text/xml, then the content is XML parsed and treated as settings -
+ with a format identical to local
+ settings files.
+ The posting of settings appeared in Pazpar version 1.2.1.
+
+
Example:
Response:
OK
]]>
-
-
+
+
- search
+
+ search
Launches a search, parameters:
-
+
session
@@ -177,7 +209,82 @@
filter
- Filtering.
+ Limits the search to a given set of targets specified by the
+ filter. The filter consists a comma separated list of
+ setting+operator+args
+ pairs. The setting is a Pazpar2 setting
+ (such as pz:id).
+ The operator is either
+ = (string match)
+ or ~ (substring match).
+ The args is a list of values separated
+ by | (or , one of the values).
+ The idea is that only targets with a setting matching one of
+ the values given will be included in the search.
+
+
+
+
+ limit
+
+
+ Narrows the search by one or more fields (typically facets).
+ The limit is sequence of one or more
+ name=args pairs separated
+ by comma. The args is a list of values
+ separated by vertical bar (|).
+ The meaning of | is alternative, ie OR .
+ A value that contains a comma (,),
+ a vertical bar (|) or
+ backslash itself must be preceded by backslash (\).
+ The pz:limitmap configuration
+ item defines how the searches are mapped to a database.
+
+
+
+
+ startrecs
+
+
+ Specifies the first record to retrieve from each target.
+ The first record in a result set for a target is numbered 0, next
+ record is numbered 2. By default maxrecs is 0.
+
+
+
+
+ maxrecs
+
+
+ Specifies the maximum number of records to retrieve from each
+ target. The default value is 100. This setting has same meaning
+ as per-target setting pz:maxrecs . If pz:maxrecs is set, it takes
+ precedence over argument maxrecs.
+
+
+
+
+ sort
+
+
+ Specifies sort criteria. The argument is a comma-separated list
+ (no whitespace allowed) of sort fields, with the highest-priority
+ field first. A sort field may be followed by a colon followed by
+ the number '0' (decreasing) or '1' (increasing). Default
+ sort order is decreasing.
+ Sort field names can be any field name designated as a sort field
+ in the pazpar2.cfg file, or the special names 'relevance' and
+ 'position'.
+
+
+ If not specified here or as sort-default"
+ in pazpar2.cfg, Pazpar2 will default to the built-in 'relevance' ranking.
+
+
+ Having sort criteria at search is important for targets that
+ supports native sorting in order to get best results. Pazpar2
+ will trigger a new search if search criteria changes from Pazpar2
+ to target-based sorting or visa-versa.
@@ -251,7 +358,7 @@ search.pz2?session=2044502273&command=stat
Session ID
-
+
@@ -275,28 +382,83 @@ search.pz2?session=2044502273&command=stat
block
- If block is set to 1, the command will hang until there are records ready
- to display. Use this to show first records rapidly without
+ If block is set to 1, the command will hang until there are records
+ ready to display. Use this to show first records rapidly without
requiring rapid polling.
+ mergekey
+
+
+ Sets mergekey for this search and rest of session, or until
+ another mergekey is given for show/search. The mergekey value is a
+ comma separated list with one or more names as they appear
+ in the service description equivalent to
+ mergekey="optional" inside a metadata element.
+ If the empty string is given for mergekey it is disabled
+ and rest of session will use the default mergekey from service
+ or stylesheet.
+
+
+ This facility, "dynamic mergekey", appeared in Pazpar2 version
+ 1.6.31.
+
+
+
+
+ sort
Specifies sort criteria. The argument is a comma-separated list
(no whitespace allowed) of sort fields, with the highest-priority
field first. A sort field may be followed by a colon followed by
- the number '0' or '1', indicating whether results should be sorted in
- increasing or decreasing order according to that field. 0==Decreasing is
- the default. Sort field names can be any field name designated as a sort field
- in the pazpar2.cfg file, or the special name 'relevance'.
+ the number '0' (decreasing) or '1' (increasing). Default
+ sort order is decreasing.
+ Sort field names can be any field name designated as a sort field
+ in the pazpar2.cfg file, or the special names 'relevance' and
+ 'position'.
+
+ If not specified here or as sort-default"
+ in pazpar2.cfg, pazpar2 will default to the built-in 'relevance' ranking.
+
+ Having sort criteria at search is important for targets that
+ supports native sorting in order to get best results. pazpar2
+ will trigger a new search if search criteria changes from pazpar2
+ to target-based sorting.
+
+
+
+ For targets where If pz:sortmap
+ is defined, a sort operation will be executed (possibly including
+ extending the search).
-
+
+
+ mergekey
+
+
+ Sets mergekey for this show and rest of session, or until
+ another mergekey is given for show/search. The mergekey value is a
+ comma separated list with one or more names as they appear
+ in the service description equivalent to
+ mergekey="optional" inside a metadata element.
+ If the empty string is given for mergekey it is disabled
+ and rest of session will use the default mergekey from service
+ or stylesheet.
+
+
+ This facility, "dynamic mergekey", appeared in Pazpar2 version
+ 1.6.31.
+
+
+
+
@@ -336,7 +498,7 @@ search.pz2?session=2044502273&command=show&start=0&num=2&sort=title:1
Retrieves a detailed record. Unlike the
show command, this command
returns metadata records before merging takes place. Parameters:
-
+
session
@@ -362,15 +524,16 @@ search.pz2?session=2044502273&command=show&start=0&num=2&sort=title:1
This optional parameter is an integer which, when given, makes
- Pazpar2 return the raw record for a target. The raw record
- from first target is numbered 0, second numbered 1, etc.
- When a raw record is returned Pazpar2 will XSLT transform the
- record but an XML version is returned. All ISO2709 records are
- returned as MARCXML. OPAC records are returned as YAZ'
- OPAC with an MARCXML sibling.
+ Pazpar2 return the original record for a specific target.
+ The record set from first target is numbered 0,
+ second record set is numbered 1, etc.
+ The nativesyntax setting, as usual, is used to determine how to
+ create XML from the original record - unless parameter
+ binary is given in which the record is
+ fetched as "raw" from ZOOM C (raw, original record).
- When offset is not given the Pazpar2 metadata for the record
+ When offset/checksum is not given, the Pazpar2 metadata for the record
is returned and with metadata for each targets' data specified
in a 'location' list.
@@ -378,6 +541,40 @@ search.pz2?session=2044502273&command=show&start=0&num=2&sort=title:1
+ checksum
+
+
+ This optional parameter is a string which, when given, makes
+ Pazpar2 return the original record for a specific target. The
+ checksum is returned as attribtue 'checksum' in element
+ 'location' for show command and record command (when checksum
+ and offset is NOT given).
+ The nativesyntax setting, as usual, is used to determine how to
+ create XML from the original record - unless parameter
+ binary is given in which the record is
+ fetched as "raw" from ZOOM C (raw, original record).
+
+
+ When offset/checksum is not given, the Pazpar2 metadata for the record
+ is returned and with metadata for each targets' data specified
+ in a 'location' list.
+
+
+
+
+
+
+ nativesyntax
+
+
+ This optional parameter can be used to override pz:nativesyntax
+ as given for the target. This allow an alternative nativesyntax
+ to be used for original records (see parameteroffset above).
+
+
+
+
+ syntax
@@ -405,9 +602,9 @@ search.pz2?session=2044502273&command=show&start=0&num=2&sort=title:1
This optional parameter enables "binary" response for retrieval
- of a raw record (i.e. when offset is specified). For binary
- responses the record is not converted to
- XML and the HTTP content type is application/octet-stream.
+ of a original record (i.e. when offset is specified). For binary
+ response the record by default is fetched from ZOOM C using
+ the "raw" option or by parameter nativesyntax if given.
@@ -453,7 +650,16 @@ search.pz2?session=605047297&command=record&id=3
name
- comma-separated list of termlist names (default "subject")
+ comma-separated list of termlist names. If omitted,
+ all termlists are returned.
+
+
+
+
+ num
+
+
+ maximum number of entries to return - default is 15.
@@ -464,7 +670,7 @@ search.pz2?session=605047297&command=record&id=3
-Output:
+ Output:
3
@@ -486,8 +692,8 @@ Output:
]]>
-
-
+
+
For the special termlist name "xtargets", results
are returned about the targets which have returned the most hits.
@@ -506,9 +712,9 @@ Output:
0 -- Z39.50 diagnostic codes
]]>
-
+
-
+
bytarget
@@ -531,7 +737,7 @@ Output:
-
+
Example output:
- SEE ALSO
+
+ SEE ALSO
Pazpar2:
@@ -576,15 +783,7 @@ search.pz2?session=605047297&command=bytarget&id=3