yaz-client(1)
NAME
yaz-client - Z39.50/SRU client for implementors
SYNOPSIS
yaz-client [-a apdulog] [-b berdump] [-c cclfile] [-d dump]
[-f cmdfile] [-k size] [-m marclog] [-p proxy-addr]
[-q cqlfile] [-t dispcharset] [-u auth] [-v loglevel] [-V]
[-x] [server-addr]
DESCRIPTION
yaz-client is a Z39.50[1]/SRU[2] client (origin) with a simple command
line interface that allows you to test behavior and performance of
Z39.50 targets and SRU servers.
From YAZ version 4.1.0 yaz-client may also operate as a SOLR[3] Web
Service client.
If the server-addr is specified, the client creates a connection to the
Z39.50/SRU target at the address given.
When yaz-client is started it tries to read commands from one of the
following files:
* Command file if it is given by option -f.
* .yazclientrc in current working directory.
* .yazclientrc in the user's home directory. The value of the HOME is
used to determine the home directory. Normally, HOME is only set on
POSIX systems such as Linux, FreeBSD, Solaris.
OPTIONS
-a filename
If specified, logging of protocol packages will be appended file
given. If filename is specified as -, the output is written to
stdout.
-b filename
If specified, YAZ will dump BER data in readable notation to the
file specified. If filename is specified as - the output is written
to stdout.
-c filename
If specified, CCL configuration will be read from the file given.
-d dump
If specified, YAZ will dump BER data for all PDUs sent and received
to individual files, named dump.DDD.raw, where DDD is 001, 002,
003, ..
-f cmdfile
Reads commands from cmdfile. When this option is used, YAZ client
does not read .yazclientrc from current directory or home
directory.
-k size
Sets preferred messages and maximum record size for Initialize
Request in kilobytes. Default value is 1024 (1 MB).
-m filename
If specified, retrieved records will be appended to the file given.
-p proxy-addr
If specified, the client will use the proxy at the address given.
YAZ client will connect to a proxy on the address and port given.
The actual target will be specified as part of the InitRequest to
inform the proxy about actual target.
-q filename
If specified, CQL configuration will be read from the file given.
-t displaycharset
If displaycharset is given, it specifies name of the character set
of the output (on the terminal on which YAZ client is running).
-u auth
If specified, the auth string will be used for authentication.
-v level
Sets the LOG level to level. Level is a sequence of tokens
separated by comma. Each token is a integer or a named LOG item -
one of fatal, debug, warn, log, malloc, all, none.
-V
Prints YAZ version.
-x
Makes the YAZ client print hex dumps of packages sent and received
on standard output.
COMMANDS
The YAZ client accepts the following commands.
open zurl
Opens a connection to a server. The syntax for zurl is the same as
described above for connecting from the command line.
Syntax:
[(tcp|ssl|unix|http)':']host [:port][/base]
quit
Quits YAZ client
find query
Sends a Search Request using the query given. By default the query
is assumed to be PQF. See command querytype for more information.
delete setname
Deletes result set with name setname on the server.
base base1 base2 ...
Sets the name(s) of the database(s) to search. One or more
databases may be specified separated by blanks. This commands
overrides the database given in zurl.
show [start[+number]]
Fetches records by sending a Present Request from the start
position given by start a number of records given by number. If
start is not given, then the client will fetch from position of the
last retrieved record plus 1. If number is not given, then one
record will be fetched at a time.
scan term
Scans database index for a term. The syntax resembles the syntax
for find. If you want to scan for the word water you could write
scan water
but if you want to scan only in, say the title field, you would
write
scan @attr 1=4 water
setscan set term
Scans database index for a term within a result set. This is
similar to the scan command but has a result set as its first
argument.
scanpos pos
Sets preferred position for scan. This value is used in next scan.
By default position is 1.
scansize size
Sets number of entries to be returned by scan. Default number of
entries is 20.
scanstep step
Set step-size for scan. This value is used in next scan sent to the
target. By default step-size is 0.
sort sortspecs
Sorts a result set. The sort command takes a sequence of
space-separated sort specifications, with each sort specification
consisting of two space-separated words (so that the whole
specification list is made up of an even number of words). The
first word of each specification holds a field (sort criterion) and
the second holds flags. If the sort criterion includes = it is
assumed that the SortKey is of type sortAttributes using Bib-1: in
this case the integer before = is the attribute type and the
integer following = is the attribute value. If no = is in the
criterion it is treated as a sortfield of type InternationalString.
The flags word of each sort specification must consist of s for
case sensitive or i for case insensitive, and < for ascending order
or > for descending order.
sort+
Same as sort but stores the sorted result set in a new result set.
authentication openauth
Sets up a authentication string if a server requires authentication
(v2 OpenStyle). The authentication string is first sent to the
server when the open command is issued and the Z39.50 Initialize
Request is sent, so this command must be used before open in order
to be effective. A common convention for the authopen string is
that the username - and password is separated by a slash, e.g.
myusername/mysecret.
sru method version
Selects Web Service method and version. Must be one of POST, GET,
SOAP (default) or SOLR. Version should be either 1.1 or 1.2 for
SRU. Other versions are allowed - for testing purposes (version
negotiation with SRU server). The version is currently not used for
SOLR Web Services
list_all
This command displays status and values for many settings.
lslb n
Sets the limit for when no records should be returned together with
the search result. See the Z39.50 standard on set bounds[4] for
more details.
ssub n
Sets the limit for when all records should be returned with the
search result. See the Z39.50 standard on set bounds[4] for more
details.
mspn n
Sets the number of records should be returned if the number of
records in the result set is between the values of lslb and ssub.
See the Z39.50 standard on set bounds[4] for more details.
status
Displays the values of lslb, ssub and mspn.
setname
Switches named result sets on and off. Default is on.
cancel
Sends a Trigger Resource Control Request to the target.
format oid
Sets the preferred transfer syntax for retrieved records.
yaz-client supports all the record syntaxes that currently are
registered. See Z39.50 Record Syntax Identifiers[5] for more
details. Commonly used records syntaxes include usmarc, sutrs and
xml.
elements e
Sets the element set name for the records. Many targets support
element sets are B (for brief) and F (for full).
close
Sends a Z39.50 Close APDU and closes connection with the peer
querytype type
Sets the query type as used by command find. The following is
supported: prefix for Prefix Query Notation (Type-1 Query); ccl for
CCL search (Type-2 Query), cql for CQL (Type-104 search with CQL
OID), ccl2rpn for CCL to RPN conversion (Type-1 Query). cql2rpn
for CQL to RPN conversion (Type-1 Query).
attributeset set
Sets attribute set OID for prefix queries (RPN, Type-1).
refid id
Sets reference ID for Z39.50 Request(s).
itemorder type no
Sends an Item Order Request using the ILL External. type is either
1 or 2 which corresponds to ILL-Profile 1 and 2 respectively. The
no is the Result Set position of the record to be ordered.
update action recid doc
Sends Item Update Request. The action argument must be the action
type: one of insert, replace, delete and update. The second
argument, recid, is the record identifier (any string). Third
argument which is optional is the record document for the request.
If doc is preceded with "<", then the following characters are
treated as a filename with the records to be updated. Otherwise doc
is treated as a document itself. The doc may also be quited in
double quotes. If doc is omitted, the last received record (as part
of present response or piggybacked search response) is used for the
update.
source filename
Executes list of commands from file filename, just like source on
most UNIX shells. A single dot (.) can be used as an alternative.
! args
Executes command args in subshell using the system call.
push_command command
The push_command takes another command as its argument. That
command is then added to the history information (so you can
retrieve it later). The command itself is not executed. This
command only works if you have GNU readline/history enabled.
set_apdufile filename
Sets that APDU should be logged to file filename. Another way to
achieve APDU log is by using command-line option -a.
set_auto_reconnect flag
Specifies whether YAZ client automatically reconnect if target
closes connection (Z39.50 only).
flag must be either on or off.
set_auto_wait flag
Specifies whether YAZ client should wait for response protocol
packages after a request. By default YAZ client waits (on) for
response packages immediately after a command (find, show) has been
issued. If off is used, YAZ client does not attempt to receive
packages automatically. These will have to be manually received
when command wait_response is used.
flag must be either on or off.
set_marcdump filename
Specifies that all retrieved records should be appended to file
filename. This command does the thing as option -m.
schema schemaid
Specifies schema for retrieval. Schema may be specified as an OID
for Z39.50. For SRU, schema is a simple string URI.
charset negotiationcharset [displaycharset] [[marccharset]]
Specifies character set (encoding) for Z39.50 negotiation / SRU
encoding and/or character set for output (terminal).
negotiationcharset is the name of the character set to be
negotiated by the server. The special name - for negotiationcharset
specifies no character set to be negotiated.
If displaycharset is given, it specifies name of the character set
of the output (on the terminal on which YAZ client is running). To
disable conversion of characters to the output encoding, the
special name - (dash) can be used. If the special name auto is
given, YAZ client will convert strings to the encoding of the
terminal as returned by nl_langinfo call.
If marcharset is given, it specifies name of the character set of
retrieved MARC records from server. See also marcharset command.
Note
Since character set negotiation takes effect in the Z39.50
Initialize Request you should issue this command before command
open is used.
Note
MARC records are not covered by Z39.50 character set
negotiation, so that's why there is a separate character that
must be known in order to do meaningful conversion(s).
negcharset charset
Specifies character set for negotiation (Z39.50). The argument is
the same as second argument for command charset.
displaycharset charset
Specifies character set for output (display). The argument is the
same as second argument for command charset.
marccharset charset
Specifies character set for retrieved MARC records so that YAZ
client can display them in a character suitable for your display.
See charset command. If auto is given, YAZ will assume that
MARC21/USMARC is using MARC8/UTF8 and ISO-8859-1 for all other MARC
variants. The charset argument is the same as third argument for
command charset.
querycharset charset
Specifies character set for query terms for Z39.50 RPN queries and
Z39.50 Scan Requests (termListAndStartPoint). This is a pure
client-side conversion which converts from displayCharset to
queryCharset.
set_cclfile filename
Specifies that CCL fields should be read from file file filename.
This command does the thing as option -c.
set_cqlfile filename
Specifies that CQL fields should be read from file file filename.
This command does the thing as option -q.
register_oid name class OID
This command allows you to register your own object identifier - so
that instead of entering a long dot-notation you can use a short
name instead. The name is your name for the OID, class is the
class, and OID is the raw OID in dot notation. Class is one appctx,
absyn, attet, transyn, diagset, recsyn, resform, accform, extserv,
userinfo, elemspec, varset, schema, tagset, general. If you're in
doubt use the general class.
register_tab command string
This command registers a TAB completion string for the command
given.
sleep seconds
This command makes YAZ client sleep (be idle) for the number of
seconds given.
wait_response [ number]
This command makes YAZ client wait for a number of response
packages from target. If number is omitted, 1 is assumed.
This command is rarely used and is only useful if command
set_auto_wait is set to off.
xmles OID doc
Sends XML Extended Services request using the OID and doc given.
zversion ver
This command sets Z39.50 version for negotiation. Should be used
before open. By default 3 (version 3) is used.
options op1 op2..
This command sets Z39.50 options for negotiation. Should be used
before open.
The following options are supported: search, present, delSet,
resourceReport, triggerResourceCtrl, resourceCtrl, accessCtrl,
scan, sort, extendedServices, level_1Segmentation,
level_2Segmentation, concurrentOperations, namedResultSets,
encapsulation, resultCount, negotiationModel, duplicationDetection,
queryType104, pQESCorrection, stringSchema.
EXAMPLE
The simplest example of a Prefix Query would be something like
f knuth
or
f "donald knuth"
In those queries no attributes was specified. This leaves it up to the
server what fields to search but most servers will search in all
fields. Some servers does not support this feature though, and require
that some attributes are defined. To add one attribute you could do:
f @attr 1=4 computer
where we search in the title field, since the use(1) is title(4). If we
want to search in the author field and in the title field, and in the
title field using right truncation it could look something like this:
f @and @attr 1=1003 knuth @attr 1=4 @attr 5=1 computer
Finally using a mix of Bib-1 and GILS attributes could look something
like this:
f @attrset Bib-1 @and @attr GILS 1=2008 Washington @attr 1=21 weather
FILES
yaz-<version>/client/client.c $HOME/.yazclientrc $HOME/.yazclient.history
SEE ALSO
yaz(7) bib1-attr(7)
NOTES
1. Z39.50
http://www.loc.gov/z3950/agency/
2. SRU
http://www.loc.gov/standards/sru/
3. SOLR
http://lucene.apache.org/solr/
4. Z39.50 standard on set bounds
http://www.loc.gov/z3950/agency/markup/04.html#3.2.2.1.6
5. Z39.50 Record Syntax Identifiers
http://www.loc.gov/z3950/agency/defns/oids.html#5
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