The majority of freeWAIS documents will be made available by WAIS, WWW, and Gopher. Try the CNIDR WWW server (http://cnidr.org/welcome.html) for the latest documents. Now that we have some moderately stable (although certainly not bug-free) code, we will be spending a bit of time on installation documents, etc.
Your comments are welcome. Please send them to freewais@cnidr.org.
Sample SCO implementation scripts and a README.SCO are available. The sample SCO implementation scripts are in the source directory /skunkware/osr5/CD-ROM/src/Tools/freeWAIS-sf-1.1 and are called indexsfftp.sh, indexsfhtml.sh and kidsf1.1.pl.
What follows is taken from the freeWAIS-sf README from the source directory.
FreeWAIS-sf*
Ulrich Pfeifer
Tung Huynhz
University of Dortmund
Lehrstuhl Informatik VI
D-44221 Dortmund
January 10, 1995
Abstract
FreeWAIS-sf1 is an extension of the freeWAIS software provided by the the
Clearinghouse for Networked Information Discovery and Retrieval (CNIDR)2 .
The SF suf#x in the software name stands for "structured3 #elds," an indexing
and search feature which distinguishes this software from its predecessors.
It is based on the version 0.2024 of this software but includes and enhances
much of what freeWAIS-0.35 contains.
Major extensions of FreeWAIS-sf include:
o Introduction of text, date, and numeric #eld structures within a document,
which allows a document to be indexed using potentially overlapping #elds.
o Support for complex Boolean searches (a query parser is integrated in the
server).
o Stemming and phonetic coding may be switched on and off for each indivi-
dual #eld.
o De#nition of document format and layout of the headlines are now con#-
gurable by a new speci#cation language based on regular expressions. No
C-code must be written to index new document types.
o Installation procedure now just requires running a sh script and answering
simple questions. The script is generated using the GNU autoconf6 utility.
No Make#le sets for individual systems are necessary. For development pur-
poses, additional Imake#les are provided since the Make#les do not contain
dependencies
o Support for country speci#c character sets (8-Bit)
o Lots of bug #xes.
All changes are restricted to the indexer and server to allow existing
clients to query FreeWAIS-sf databases. Document types contained in the
original distribution remain intact. You can use FreeWAIS-sf as you would
use original freeWAIS or take advantage of its enhanced features.
________________________________________________*
You can get a Postscript Versionyof this document.
email: pfeifer,huynh1@ls6.informatik.uni-dortmund.de
ftp://ls6-www.informatik.uni-dortmund.de/pub/wais/freeWAIS-sf-1.1/freeWAIS-sf-1.1.tgz
http://cnidr.org/welcome.html
Histoically the #s# meant #soundex#
ftp://nic.switch.ch/mirror/wais/servers/freeWAIS/freeWAIS-0.202.tar.Z
ftp://ftp.bio.indiana.edu/util/wais/freeWAIS-0.3.tar.gz
ftp://hpcsos.col.hp.com/mirrors/.hpib0/gnu/autoconf-1.10.tar.gz
1 Supported Systems
FreeWAIS-sf is known to compile cleanly on many different UNIX platforms,
particularly using the GNU C compiler. The known platforms include:
OS Version Hardware Compiler
____________________________________________
A/UX 3.1 mc68040 gcc 2.5.7
AIX 2 0000001964 cc
AIX 2 0000008314 cc
AIX 2 0000024535 cc
AIX 2 000003085C cc
AIX 2 0000052366 cc
AIX 2 0000056118 cc
AIX 2 0000061138 cc
AIX 2 0000080931 cc
AIX 2 0000091446 cc
AIX 2 0000195011 cc
AIX 2 0000201518 cc
AIX 2 0000261834 cc
AIX 2 0000298037 cc
AIX 2 0000334735 cc
AIX 2 0000420476 cc
AIX 2 0000603735 cc
AIX 2 0000610646 cc
AIX 2 0000826246 cc
AIX 2 0000840341 cc
AIX 2 0002048547 cc
AIX 2 0003809731 cc
BSD/386 1.0 i386 gcc
BSD/386 1.1 i386 gcc
FreeBSD 1.1.5(RELE i386 gcc
FreeBSD 1.1.5.1(RE i386 gcc
HP-UX A.09.00 9000/822 gcc 2.5.6
HP-UX A.09.01 9000/720 gcc 2.5.8
HP-UX A.09.01 9000/755 gcc 2.5.8
HP-UX A.09.04 9000/816 gcc 2.5.8
HP-UX A.09.04 9000/887 gcc 2.3.3
HP-UX A.09.05 9000/715 cc
IRIX 4.0.5F IP20 gcc 2.5.2
IRIX 5.2 IP19 cc
IRIX 5.2 IP22 gcc 2.5.8
Linux 1.0.8 i486 gcc 2.5.8
Linux 1.0.9 i486 gcc 2.5.8
Linux 1.1.18 i486 gcc 2.5.8
Linux 1.1.18 i586 gcc 2.5.8
Linux 1.1.33 i486 gcc 2.5.7
Linux 1.1.45 i486 gcc 2.6.0
Linux 1.1.47 i486 gcc 2.5.8
Linux 1.1.49 i486 gcc 2.5.8
Linux 1.1.50 i486 gcc 2.5.8
Linux 1.1.51 i486 gcc 2.5.8
Linux 1.1.52 i486 gcc 2.6.0
Linux 1.1.55 i486 gcc 2.5.8
Linux 1.1.57 i486 gcc 2.5.8
Linux 1.1.59 i486 gcc 2.5.8
Linux 1.1.60 i486 gcc 2.5.8
Linux 1.1.61 i486 gcc 2.5.8
Linux 1.1.62 i486 gcc 2.5.7
Linux 1.1.64 i486 gcc 2.5.8
Linux 1.1.65 i486 gcc 2.5.8
Linux 1.1.70 i486 gcc 2.5.8
OSF1 V2.0 alpha cc
OSF1 V2.0 alpha gcc 2.5.4
OSF1 V2.1 alpha cc
OSF1 V2.1 alpha gcc 2.5.8
OSF1 V2.1 alpha gcc 2.6.0
OSF1 V3.0 alpha cc
SCO OpenServer 5 3.2.v5 i486 cc
SunOS 4.1.1 sun4c cc
SunOS 4.1.1 sun4c gcc 2.5.8
SunOS 4.1.1 sun4c gcc 2.6.1
SunOS 4.1.1-JL sun4c gcc 2.6.2
SunOS 4.1.2 sun4 cc
SunOS 4.1.2 sun4 gcc 2.5.8
SunOS 4.1.2 sun4c cc
SunOS 4.1.2 sun4c gcc 2.2.2
SunOS 4.1.2 sun4c gcc 2.4.2
SunOS 4.1.2 sun4c gcc 2.4.5
SunOS 4.1.2 sun4c gcc 2.5.8
SunOS 4.1.3 sun4 gcc 2.5.8
SunOS 4.1.3 sun4c cc
SunOS 4.1.3 sun4c gcc 2.3.3
SunOS 4.1.3 sun4c gcc 2.5.5
SunOS 4.1.3 sun4c gcc 2.5.8
SunOS 4.1.3 sun4m acc
SunOS 4.1.3 sun4m cc
SunOS 4.1.3 sun4m gcc 2.3.2
SunOS 4.1.3 sun4m gcc 2.3.3
SunOS 4.1.3 sun4m gcc 2.5.6
SunOS 4.1.3 sun4m gcc 2.5.7
SunOS 4.1.3 sun4m gcc 2.5.8
SunOS 4.1.3 sun4m gcc 2.6.1
SunOS 4.1.3-JL sun4c gcc 2.5.8
SunOS 4.1.3C sun4m gcc 2.5.8
SunOS 4.1.3_Axil sun4m gcc 2.6.0
SunOS 4.1.3_U1 sun4c gcc 2.4.5
SunOS 4.1.3_U1 sun4c gcc 2.5.8
SunOS 4.1.3_U1 sun4m cc
SunOS 4.1.3_U1 sun4m gcc
SunOS 4.1.3_U1 sun4m gcc 2.4.2
SunOS 4.1.3_U1 sun4m gcc 2.5.7
SunOS 4.1.3_U1 sun4m gcc 2.5.8
SunOS 4.1.3_U1 sun4m gcc 2.6.0
SunOS 5.2 sun4c gcc 2.5.6
SunOS 5.2 sun4m gcc 2.5.6
SunOS 5.3 sun4c gcc 2.5.6
SunOS 5.3 sun4c gcc 2.5.8
SunOS 5.3 sun4d gcc 2.4.5
SunOS 5.3 sun4d gcc 2.5.6
SunOS 5.3 sun4d gcc 2.5.7
SunOS 5.3 sun4d gcc 2.5.8
SunOS 5.3 sun4m acc
SunOS 5.3 sun4m gcc
SunOS 5.3 sun4m gcc 2.4.5
SunOS 5.3 sun4m gcc 2.5.6
SunOS 5.3 sun4m gcc 2.5.7
SunOS 5.3 sun4m gcc 2.5.8
SunOS 5.3 sun4m gcc 2.6.0
SunOS 5.3 sun4m gcc 2.6.1
SunOS 5.4 i86pc gcc 2.5.8
ULTRIX 4.2 RISC gcc 2.5.6
ULTRIX 4.3 RISC gcc 2.5.6
ULTRIX 4.3 RISC gcc 2.5.8
ULTRIX 4.3 RISC gcc 2.6.1
ULTRIX 4.4 RISC gcc 2.6.3
dgux 5.4R2.10 AViiON gcc
dgux 5.4R2.10 AViiON gcc 2.4.1
This is not an exhaustive list of supported platforms but represents those
systems reported to the authors. If you have ported FreeWAIS-sf to an
additional platform, please provide the name, OS number, and compiler used
to the authors for inclusion in updated release notes.
2 History
Development of FreeWAIS-sf was begun in Summer 1993 as bug #xes for
version 0.202 of the CNIDR distribution. These #xes included boolean
operators, partial match search and phonetic indexing. We mailed the #xes
to CNIDR but received no acknowledgement. We decided to redesign the server
to parse the queries since we felt that boolean operations cannot be performed
correctly without ensuring that the query conforms to a syntax. At the same
time we felt that adding C-code for indexing new document formats is too much
to require of most data or system system administrators. We also saw a need to
split up documents into a number of different #elds with possibly different
indexing methods.
Since feedback from CNIDR was still missing in February 1994, we
released our #rst version called freeWAIS-0.2-sf-alpha.tar.gz. This #rst
version used Imake#les for installation and was successfully compiled on many
systems. Due to #xes to installation code and numerous bug #xes 8 subsequent
versions (through freeWAIS-0.2-sf09-- alpha.tar.gz) were released.
Since this last alpha version contained most of the features we want
to implement, we generated the #rst beta version. Many people, (namely running
AIX and DG/UX systems) had no working imake on their machines, we added a
con#gure script generated by autoconf for the installation procedure.
This script generates templates containing system and installation
information. Simple make#les are thereby generated which allow compilation
and installation of FreeWAIS-sf on a great variety of systems. See the list
of supported systems in Section 1. This Make#les do not contain dependencies
of the generated #les. To recompile after changes, run make clean then make
all or use Make#les generated by imake. The last beta version was
freeWAIS-0.2-sf-beta-05.tar.gz7 At this time we decided not to wait for CNIDR,
which seems mainly concerned with the Z39.50 Version 38 de#nition and
differentiate this version from the CNIDR products by
________________________________________________7
8ftp://ls6-www.informatik.uni-dortmund.de/pub/wais/beta-05/freeWAIS-0.2-sf-beta-05.tar.gz
http://www.research.att.com/ wald/z3950.html
dropping the -0.2- in the name.
During July, August and September we removed some bugs in memory handling. Purify is
now completely happy with waisindex, waissearch and waisserver. For more
information on some minor changes, look at sections 2.3 to 2.9.
A couple of beta testers spent their time for porting to other systems. From all the people
helped us with comments, suggestions and patches (63 netters!), we would like to mention
the following (which had a really hard time):
Eric Hagberg
Steve Hsieh
Douglas D. Nebert
Jean-Philippe Martin-Flatin
Thank you all!
After that we be released
freeWAIS-sf-1.1
in September 1994.
Releases
2.1 1.1
Patches 1-9 for 1.0 are integrated. Also ctypes are faster now. Added #eld description to
the *.src #les.
patch001 Scandir
Fixes a problem with waisindex. Indexing a database the #rst time causes core dump
on some systems because the return value of scandir was not checked.
patch002 X11R6
Makes the x client compile with X11R6.
patch003 waisserver
Adds a forgotten f#ush which caused problems on some systems.
patch004 xwais
Fixes an "one-off" bug in qcommands.c.
patch005 server security
when the server accepted a connection from a client, the host_name and host_address
variables were left as empty strings (and so never matched the entries in theDATA_SEC
#le)! These need to be reset for each new client connection, which is what the patch
does.
patch006 long headlines
Fixes a bug regarding long headlines. This bug prevents long headlines from being
returned using waisq, waissearch, etc.
patch007 line numbers for format #le parsing
Due to incompatibilities of #ex, the fmt #le parser always complains about syntax
errors in line 0. This patch #xes this problem - you now will get the real line number,
where the error occurred.
patch008 unreadable #les
Indexing with the '-r' option caused core dumps when encountering an unreadble
#le. Also encountering already indexed #les was fatal. The patch solves this. A
message is printed in both cases.
patch009 date in headline
The date format for the headline did not work. This patch solves most of the known
problems with this.
2.2 1.0
Jae W. Chang wrote in his article in comp.infosystems.wais9 : What happens is that scandir
is searching for #les of the form field_.. If it exists, then they are
removed since the user speci#ed a new database to be created and new #les have to be
created by the same name.
This is a bug. The result from scandir should've been checked. If the result is 0 - meaning
no #les of the above form were found - the matches array is never allocated, BUT the code
still dereferences matches as if it were allocated thus seg fault.
Just looking brie#y at an Ultrix man page, freeWAIS-sf will bomb on this dec as well at the
same spot, so it's not just isolated to a "linux" quirk.
Here's my diff:
diff -c -r1.22 field_index.c
*** 1.22 1994/09/07 13:29:22
--- field_index.c 1994/10/05 14:10:26
***************
*** 760,776 ****
strcpy(path,dir);
strncat(path,"/",MAX_FILENAME_LEN);
! scandir(dir, &matches, rmselector, NULL);
! for(i=0;matches[i];i++) -
! path[strlen(dir)+1] = '"0';
! strncat(path,matches[i]->d_name,MAX_FILENAME_LEN);
! s_free(matches[i]);
! waislog(WLOG_LOW, WLOG_INFO, "deleting ""%s""", path);
! if (unlink(path)) -
! waislog(WLOG_HIGH, WLOG_ERROR, "unlink failed");
! "
"
- s_free(matches);
return(i);
"
________________________________________________9
news:UiYNLx600WB_RYIYUW@andrew.cmu.edu
--- 760,777 ----
strcpy(path,dir);
strncat(path,"/",MAX_FILENAME_LEN);
! if ( scandir(dir, &matches, rmselector, NULL) > 0 ) -
! for(i=0;matches[i];i++) -
! path[strlen(dir)+1] = '"0';
! strncat(path,matches[i]->d_name,MAX_FILENAME_LEN);
! s_free(matches[i]);
! waislog(WLOG_LOW, WLOG_INFO, "deleting ""%s""", path);
! if (unlink(path)) -
! waislog(WLOG_HIGH, WLOG_ERROR, "unlink failed");
! "
! "
! s_free(matches);
"
return(i);
"
2.3 0.9.10
o Support for HPUX_SOURCES added.
o Compiler version is now reorted by udping
2.4 0.9.8
o Patch from Alberto Accomazzi, which causes stopwords to be taken either from
the internal list or from the speci#ed #le. Option -stop /dev/null will run
waisindex without any stopwords.
o Passes cc again.
2.5 0.9.7
o Removed the ANSI_LIKE de#ne in Default.tmpl.in, which caused problems in com-
pilation on some platforms. We will postpone the ANSI stuff.
o Added tests for overlapping copies with bcopy() and memcpy(). If neither bcopy
nor memcpy can handle this, a slow but working function in cutil.c is used.
o Support for caching the synonyms in shared memory provided by Alberto Accomazzi
was added. Here is what he wrote about it:
Caching is turned on by running waisserver with the #ag -cachesyn.
For those of you who have fairly large synonym #les (> 10Kb) and are running the
software on a machine that supports shared memory (all the UNIX boxes that I have
worked with do now), enabling this feature will speed up the waisserver response
time by a signi#cant factor.
For those of you who do not have shared memory, I have rewritten the memory
allocation part of synonym.c so that bigger memory chunks are allocated and used
rather than allocating memory for each word and synonym, so the code should be a
little faster for you too.
You can #nd a brief explanation of how caching works in the header of synonym.c.
2.6 0.9.6
o Added the headline #x from Marko Niinimaki. Moved all de#nes to Defaults.tmpl.
Removed ir/irlex.h from dist.
o Clean the #uninitialized Memory Read# bug in waissserver.
2.7 0.9.5
o Changed numbering for versions (to make jp happy)
o Changed con#gure code for -lsocket and -lnsl
o Fixed the TELL_USER code again to conform to ANSI
o Added install.lib target for the Make#les. (Only with Imake)
o Some additions to documentation
o Files on waisindex command line may now have extension ".gz".
2.8 0.94
o Some little #xes to make purify happy.
o Fixed the keyword code.
o config.h is not in the distribution any more, which was a bug.
o The result of getenv("USER") will not break waisserver any more if NULL is returned.
2.9 0.93
In this version code was added to send me a UDP packet each time the INFO database gets
re-indexed. This should not disturb the normal operation of the server, even if the sending
fails. I included that to track use of the software. You can switch this off by de#ning
DO_NOT_TELL_ABOUT_ME in Defaults.tmpl
2.10 Beta 05
o A bug in calculation the #Total word count# has been #xed
o Indexing and retrieval of #les compressed by the GNU gzip is now supported. If you
want to index a #le TEST.gz, call waisindex with the extension stripped:
waisindex -t text -d test TEST
This worked formerly only with the standard compress command and the #.Z#
extension.
3 Indexing
If you want to index a collection of #les containing one or more documents using FreeWAIS-
sf #rst look at the supported document type formats. You may look at the manual page
of waisindex10 or type waisindex without arguments for information about supported
document types.
If your document object is one of the supported types, run the waisindex command with the
t -t argument:
waisindex -d index_file_root_name -t doc_type object object : : :
where:
-d denotes the rootname to be used for the collection of index #les and will include suf#xes
created by the waisindex program
-t denotes the document types supported by the waisindex command
object is the #le name of a target object to be indexed by the command.
Both the -d and object speci#cations support full pathnames and default to the current
directory if no pathnames are provided.
If you have a document in an unsupported format or would like to split individual documents
into #elds, you must generate two document format #les.
First you should decide which #elds you will use, and what their name should be. Usually
it is a good idea to provide further information about what the #elds contain or mean. The
#eld de#nition #le .fde contains this information. Here is an example:
py: publication year
au: author
ti: title
jt: journal title
ck: citation key
Waisindex will put the names of the generated #elds in the server description (.-
src) it will produce if a #eld de#nition #le is encountered.
Now comes the hard part. You now have to generate a format #le .fmt for
your new database. Look at the examples11 on our ftp server if the following is too obscure.
The abstract syntax for the speci#cation #les follows:
________________________________________________10
11 http://ls6-www.informatik.uni-dortmund.de/htbin/man?waisindex()
ftp://ls6-www.informatik.uni-dortmund.de/pub/wais
3.1 Document Speci#cation Syntax
format ! regexp speclist
speclist ! spec | spec speclist
<#eld> REGEXP regexp
#eld-list
spec ! options
index-specs
regexp
options ! 2 | option options
NUMERIC regexp INT
options ! HEADLINE regexp INT
DATE REGEXP REGEXP date date date regexp
index-specs ! 2 | index-spec index-specs
index-spec ! index-type dicts
index-type ! TEXT | SOUNDEX | PHONIX
dicts ! GLOBAL | LOCAL | BOTH
date ! DAY | MONTH month-spec | YEAR
month-spec ! 2 | STRING
#eld-list ! 2 | WORD #eld-list
Now what do the index types LOCAL, GLOBAL and BOTH mean?
Note that FreeWAIS-sf generates dictionaries and inverted #les for each #eld. If there were
no global or default #eld for general text search one would always have to specify a #eld
in your queries. To avoid this inconvenience waisindex generates a default #eld which is
used for searching if there is no #elds speci#ed. This #eld is called global, since it usually
contains the information of some of the other #elds which the administrator assumes to be
useful for unexperienced users.
The contents of the index #eld are de#ned by using the keywords LOCAL, GLOBAL and
BOTH in the #eld de#nitions.
LOCAL Words in this #eld are not inserted in the global database and are only retrievable
by #eld query. Numeric and date #elds are particularly well suited to the use of this
option.
GLOBAL Words in this #eld are only inserted in the global database. This is analogous
to the default free-text search of other versions of freeWAIS but allows all or part of
the document to be indexed for general search. Do not specify a #eld name in this
case since the #eld will be empty!
BOTH Words in this #eld are inserted in both the current #eld database and the global
database.
Regular expressions are used to #nd, match, and parse strings encountered in a document.
These regular expressions are used within the .fmt #le to delimit #eld entries. For those not
familiar with regular expressions, some conventions are provided in the following section:
3.1.1 REGULAR EXPRESSION SYNTAX
__Operator____________Meaning___________________________________
x the character "x"
"x" an "x", even if x is an operator
"x an "x", even if x is an operator
[xy] the character x or y
[x-z] the characters x, y or z
[^x] any character but x
. any character but newline
^x an x at the beginning of a line
x$ an x at the end of a line
x? an optional x
x* 0,1,2, ... instances of x
x+ 1,2,3, ... instances of x
x_y an x or a y
(x) an x
x-m,n" m through n occurrences of x
Note that the scanner requires an aditional level of escaping because the '/' indicates the
end of the regular expression. So '/' must be escaped by a backslash: '"/'. If you need
a backslash in you regexp, it must me escaped to: '""'. Since formfeed and other control
characters are often needed '"x' for x from 'A' to 'Z' is mapped to '^x' (ctrl x, ). This
means 'A' is subtracted from the original character.
For example "A=^A(ctrnl A), "B = ^B, : : :"J = "n (newline). This is somewhat
ad-hoc, but was easy to implement and allows users of limited editors to enter control
characters in the format #le.
Here is a #rst small example of a structured document collection to be indexed.
3.1.2 Small example
Suppost you have #les containing many documents, from which you will only index thier
titles contained between tags:
Information Retrieval <:TI>
[...]
Database Systems <:TI>
You format #le (.fmt) should look like this:
//
ti TEXT LOCAL
/<:TI>/
Now that you have you format #le .fmt, call waisindex with option '-t
fields'. Because the .fmt #le already begins with the index #le root name it is used by
the FreeWAIS-sf waisindex program. The -t #elds option must have a .fmt #le present.
Now its time to give a more complicated example:
3.1.3 DOCUMENT SPEC EXAMPLE
For an example #le like this
CK: Mostert/etal:89
AU: Mostert, D.N.J.; Eloff, J.H.P.; von Solms, S.H.
TI: A Methodology for Measuring User Satisfaction.
JT: Information processing & management.
ED: JAN-01-1994
VO: 25
PY: 1989
NO: 5
PP: 545
^L
CK: Qiu:90
AU: Qiu, Liwen
TI: An Empirical Examination of the Existing Models for
Bradford's Law.
JT: Information processing & management.
ED: JAN-01-1994
VO: 26
PY: 1990
NO: 5
PP: 655
^L
the following format #le could be used:
/^L/ records are separated by form feeds (Cntrl-L not
'^L' ! "L would be equivalent)
line which starts with 'TI: ' and ends with
/^TI: / /^[A-Z][A-Z]:/ /^[A-Z][A-Z]:/ #rst 50 chars after 'TI: '
50 /TI: / are copied to the chars 1 to 50 of the headline.
line which starts with 'AU: ' and ends with
/^AU: / /^[A-Z][A-Z]:/ /^[A-Z][A-Z]:/ #rst 50 chars after 'AU: '
50 /AU: / are copied to chars 51 to 100 of the headline.
/^ED: / line starts with /^ED: / /%s-%d-%d/ is
/%s-%d-%d/ sscanf_argument Month is a string (nummber by
month string day year
/^ED: [^ ]/ default if you don't type 'string') after month
is day, then year. /^ED: [^ ]/ is the begin of
index position.
end of layout.
/^PY: / It is a numeric #eld of length 4, begin at #rst
py number of PY, e.g if the number is 1990 then the
/^PY: [^ ]/ 4 TEXT LOCAL
/^[A-Z][A-Z]:/ regexp /^PY: [^ ]/ means ^ here is the begin
of the number (begin of line by default) indexed
with type TEXT in the local dictionary only and
ends with the next tag. Note that matching for
the end tag is restricted to posintions after the skip
regexp /^PY: [^ ]/. This enshures, that the
PY: is not recognized as end tag, causing the #eld
to be empty.
/^AU: / #eld 'au' is indexed with types TEXT and SO-
au SOUNDEX LOCAL TEXT LOCAL UNDEX in the local dictionary.
/^[A-Z][A-Z]:/
/^CK: / #eld 'ck' is indexed with type text in the local
ck TEXT BOTH and the global dict.
/^[A-Z][A-Z]:/
/^TI: / #eld 'ti' is indexed with type text in the local
ti stemming TEXT BOTH and the global dict. 'stemming' indicate that
/^[A-Z][A-Z]:/ the stemmer is to call for this #eld (no stemming
by default).
/^AU: / #eld 'au' is indexed with type text in the local
au TEXT BOTH and the global dict.
/^[A-Z][A-Z]:/
/^JT: / /^JT: [^ ]/ #elds 'jt' and 'jt' are indexed with type text
ti jt TEXT BOTH in the local and the global dict. The begin is at the
/^[A-Z][A-Z]:/ #rst character after this regexp /^JT: [^ ]/
(optional, begin of line by default), e.g JT: Infor-
mation processing & management. ^ here is the
beginning to index.
/^AU: / line which begins with the regexp /^AU: /
TEXT GLOBAL should be indexed only in global dictionary.
/^[A-Z][A-Z]:/
3.2 Note
o If a separator is a empty line the regexp for this is "J.
o The length of a headline is 100 characters. If you want to change the length of headline
update MAX_HEADER_LEN and MAX_HEADLINE_LEN in Defaults.tmpl.
o Of course, you can use other options too, e.g, waisindex -d index_filename
-t fields -r filename
o If you want to create only one #eld, but the old #elds should not be deleted you can
use the option -nfields. In the document speci#cation you must add new #elds
which you want to index.
Example
...
/^AU: /
names TEXT LOCAL _ BOTH
/^[A-Z][A-Z]:/
Only #eld 'names' would be created.
o If you want to specify the headline corresponding to the format de#ned, e.g. (irlist,
mail_or_rmail, etc.), and don't want to use the standard #eld format for headlines you
must call this:
waisindex -d test -t fields -t mail_or_rmail TEST.
The -t mail_or_rmail option must be after the -t fields option!
When you have generated your format #le, run waisindex with the '-t fields' #ag
and see if your speci#cation works. If the parser encounters a syntax error, there is very
limited support for debugging the offending part of your speci#cation.
Best way to circumvent this is to start with a very simple de#nition and try waisindex every
now and then.
4 Queries
4.1 How can you make a search query ?
4.1.1 QUERY SYNTAX
query ! expression
expression ! term
expression OR term
expression term OR may be ommited
term ! factor
term AND factor
term NOT factor NOT really means AND NOT
factor ! word
( expression )
#eld = ( s_expression )
#eld = word
#eld = phonix_soundex word phonix or soundex search
#eld = = word for numeric #elds
#eld < word
#eld > word
same as above, but no #eld spec is allowed, since one is given already
s_expression ! s_term
s_expression OR s_term
s_expression s_term
s_term ! s_factor
s_term AND s_factor
s_term NOT s_factor
s_factor ! WORD
( s_expression )
4.1.2 QUERY EXAMPLES
information retrieval free text queries
information OR retrieval same as above
ti=information retrieval information must be in the title
ti=(information retrieval) one of them in title
ti=(information OR retrieval) one of them in title
ti=(information AND retrieval) both of them in title
ti=(information NOT retrieval) #information# in title and #retrieval# not
in title
py==1990 numeric equal
py<1990
py>1990
au=(soundex salatan) soundex search matches eg. #Salton#
ti=('information retrieval') literal search
ti=(information system*) partial search
The use of capital letters for the Boolean operators is not required but is provided in this
example for clarity. All search matching is case-insensitive.
5 Weighting
Here is an excerpt of the corresponding smart routine:
The documents would be presented by term vectors of the form
D = (t0 ; wd0 ; t1 ; wd 1; :::; tt; wdt )
where each tk identi#es a content term assigned to some sample document and wdk repres-
ents the weight of term tk in Document D (or query Q). Thus, a typical query Q might be
formulated as
Q = (q0 ; wq0 ; q1 ; wq 1; :::; qt; wqt )
where qk once again reprents a term assigned to query Q. The weights could be allowed to
vary continuosly between 0 and 14, the higher weight assignments near 1 being used for the
most important terms, whereas lower weights near 0 would characterize the less important
terms. Given the vector representation, a query-document similarity value may be obtained
by comparing the corresponding vectors, using for example the conventional vector product
formula
similarity(Q; D) = sum(wqk * wdk ); k = 1tot:
Three factors important for term_weighting:
1. term frequency in individual document (recall)
2. inverse document frequency (precision)
3. document length (vector length)
Term frequency component used: new _wgt = 0:5 + 0:5 * tf =max_tf augmented nor-
malized term frequency (tf factor normalized by maximum tf in the vector, and further
normalized to lie between 0:5 and 1:0).
Collection frequency component used: 1:0 no change in weight; use original term frequency
component. p __________________P
Normalization component used: new _wgt2 = vector _length.
Thus, document term weight is: wdk = new _wgt=vector _length
By query term weighting, it is assumed that tf is equal to 1. So that wqk = 1.
5.1 Document term weighting by standard Boolean formulations
Given queries "AorB", "AandB", and "AnotB" (A and-not B), a document X with weights
dA (X ) and dB (X ) for terms A and B. The retrieval values are:
o dA (X ) + dB (X ) for query (AorB)
o min(dA (X; dB (X ) for query (AandB)
o min(A; 1 - dB (X )) for query (AnotB(Aand - notB))
Note: If you use these new formula the inverted #les (.inv) will have a new structure.
5.1.1 Term weighting in wais
wdk = ((log(tf ) + 10) * idf )=number _of _terms_in_a_document
o tf = term frequency. Initially is tf = 5.
o idf = 1/term_frequency_in_the_collection
5.1.2 Disadvantages
o For example a database consists of 10 documents. A term which occurs 10 times in a
document has the idf = 1/10. The same term which occurs in 10 documents has also
idf = 1/10. One can say in both cases the term has the same relevance. This may not
be correct.
o The normalization factor is not the weight of each term in the document but number
of terms in a document.
6 Installation
Just run the configure script in the Distribution. If you have a working imake on you
system, enter xmkmf -a now.
Then type:
make
to build the system and run the tests
make install
to install binaries and scripts
make install.man
to install the manual pages only with imake. The default Make#les install them with
make install
make install.lib
to install the libraries only with imake.
make clean
removes object #les, libraries, backups, : : :
make veryclean
removes #les generated by #ex, bison, dvips, latex
7 FreeWAIS-sf and WWW
Linking was tested with:
o NCSA Mosaic 2.4
o Tuebingen Univ Mosaic 2.4.2
o CERN httpd 3.0
7.1 freeWAIS-sf and CERN httpd
Direct WAIS access for CERN httpd 3.0 is easy to provide with freeWAIS-sf 1.1. The only
thing you need to do is rename the WAIS libraries in CERN httpd Make#le's.
If you're a lucky guy and your system supports imake, you need to:
o Retrieve Rainer Klute's Imake extension to CERN httpd 3.012
o Replace WWW.cf in the top-level directory with this code in Appendix A
o Update the location of your freeWAIS-sf code in WWW.cf (variable WAISDIR)
If your system doesn't support imake, you need to update manually the WAIS libraries in
the Make#le pertaining to your architecture and the top-level Make#le. And think about
how easy life would be if only you had imake.
Enjoy
Jean-Philippe (syj@ecmwf.co.uk)
There is also a CGI Gateway especially suited for FreeWAIS-sf which enables usage of
Mosaic forms for searching. See the SFgate Documentation and Demos13 on our http
server.
8 FreeWAIS-sf and gopher 2.1.1 (by Steve Hsieh)
Files used:
gopher2_1_1.tar.Z
freeWAIS-sf-1.0.tgz
Changes made to the distribution:
Apply patches 1-6,8-9 (not 7) to the original freewais-sf-1.0 source tree. You may or may
not want to apply all of them. Patches available in the pub/wais directory on ftp://ls6-
www.informatik.uni-dortumund.de
SPECIAL NOTES:
Linux: you must at least apply patch001
Solaris: do not apply patch005
________________________________________________12
13 ftp://ftp.germany.eu.net/pub/infosystems/www/cern/WWW-Imake.tar.gz
http://ls6-www.informatik.uni-dortmund.de/SFgate/SFgate
How to in gopher2_1_1/gopherd/Make
replaced original SFWAISOBJ with:
(linux):
SFWAISOBJ = ../regexp/libregexp.a ../ir/libinv.a ../ir/libclient.a "
../ir/libwais.a ../ir/liblocal.a ../ir/libsig.a "
../ui/source.o ../lib/libftw.a
(solaris & SunOS):
SFWAISOBJ = ../ir/libinv.a ../ir/libclient.a ../ir/libwais.a "
../ir/liblocal.a ../ir/libsig.a ../ui/source.o "
../regexp/libregexp.a ../lib/libftw.a
in gopher2_1_1/gopherd/waisgopher.c: change
MIN(
to
MINIMUM(
run con#gure in freeWAIS-sf-1.0
For the following con#gure questions, 'required' means that I had to use that value to get
gopher to work with freewais-sf. 'doesn't matter' means that the decision is up to you...
Do you want to use your systems regexp.h (no)? no <-- required
Will you have HEADLINE files greater than 16 MB (no)? no <-- doesn't matter
Use your systems ctype (no)? yes <-- required
Do you want to compile with -DLOCAL_SEARCH (yes)? yes <-- required
Do you want to use the modified URL handling (no)? no <-- doesn't matter
Where should the installation go (/usr/local/wais)? (specify your own path)
Do you want to use shm cache (no)? no <-- doesn't matter
Disable the UDP packet sending (no)? no <-- doesn't matter
make freewais-sf-1.0 : : :
create symbolic links to in gopher2_1_1 to the appropriate freewais-sf directories...
In gopher2_1_1:
ln -s ../freeWAIS-sf-1.0/ir
ln -s ../freeWAIS-sf-1.0/ui
ln -s ../freeWAIS-sf-1.0/lib
ln -s ../freeWAIS-sf-1.0/regexp
Edit gopher2_1_1/Makefile.conf gopher2_1_1/conf.h as necessary for your
system and site.
Make sure to uncomment -DFREEWAIS_SF in Makefile.conf !
make gopher...
In the case of an index type not recognized error, test an index on an database that has been
reindexed using the newly compiled waisindex in freeWAIS-sf-1.0/ir (as opposed
to gopherindex) just to make sure that there really still is a problem...
9 FreeWAIS-sf and gopher 2.016 (by Steve Hsieh)
Here are the changes that I made to get freewais1.0 and gopher2.016 running happily
together the way we wanted:
o The important freewais-sf con#gure options (questions below with no value can take
on a value of your choice):
use your systems regexph.h? (no) <-- necessary for gopher to work
headlines > 16MB? (yes)
use systems ctype? (yes) <-- necessary for gopher to work
compile with -DLOCAL_SEARCH? (yes) <-- necessary for gopher to do local searches
modify URL?
install where?
use shm cache?
disable UDP packet sending?
o make freewais-sf
o cd to freeWAIS-sf-dir/ir and type, ar cq sfextra.a query_y.o field_y.o
query_l.o. Some systems need a call of ranlib: ranlib sfextra.a.
o cd to freeWAIS-sf-dir/bin and type,
ln -s ../regexp/libregexp.a regexp.a
ln -s ../lib/libftw.a libftw.a
o Create ui, ir, and bin symbolic links in gopher source directory to corresponding
ui, ir, and bin dirs in freewais-sf-dir as instructed in gopherd installation docs
regarding wais.
o Apply this patch14 to the gopher-dir/gopherd directory. Instructions on how to do
this are included with the #le.
o make gopher
That's all there is to it...
Contents of patch #le
Below, I have summarized (in words) the changes that the patch above makes to #les in
gopher-dir /gopherd. Please use the patch to make the actual changes, as there may be
typos or other kinds of errors below...
o in gopher-dir/gopherd/waisgopher.c Between the two lines
readSearchResponseAPDU(&query_response, response_message +
HEADER_LENGTH);
display_search_response(query_response, server_name, service, database,
SourceName, sockfd, view, isgplus);
added:
LOGGopher(sockfd, "search %s for %s", database, keywords);
Also replaced:
________________________________________________14
ftp://ls6-www.informatik.uni-dortmund.de/pub/wais/gopher2.016.patch.gz
MIN
with
MINIMUM
o in gopher-dir/gopherd/Make Commented out existing WAISOBJ and re-
placed with:
WAISOBJ = ../ir/libinv.a ../ir/libclient.a "
../ir/libwais.a $(WAISGATEOBJ) "
../bin/regexp.a ../ir/libinv.a "
../ir/sfextra.a ../bin/regexp.a ../bin/libftw.a
o For Path=7/indexdir/index to work in .links #les, we could do this by
changing the openDatabase call Waisindex.c from
db = openDatabase(new"_db"_name, false, true);
db = openDatabase(new"_db"_name, false, true, false);
But booleans don't work when we do this...so instead, we modify the following #les:
o In gopher-dir/gopherd/gopherd.c:
Replace
case '7':
/*** It's an index capability ***/
result = GDCCanSearch(Config, CurrentPeerName, CurrentPeerIP,
NUMgopherds);
if (result == SITE_NOACCESS) -
Abortoutput(sockfd, GDCgetBummerMsg(Config));
LOGGopher(sockfd, "Denied access for %s", Selstr+1);
break;
" else if (result == SITE_TOOBUSY) -
Abortoutput(sockfd, "Sorry, too busy now...");
break;
"
Do_IndexTrans(sockfd, Selstr+1, cmd, TRUE);
break;
with:
case '7':
-
int Index_type=0;
/*** It's an index capability ***/
result = GDCCanSearch(Config, CurrentPeerName, CurrentPeerIP,
NUMgopherds);
if (result == SITE_NOACCESS) -
Abortoutput(sockfd, GDCgetBummerMsg(Config));
LOGGopher(sockfd, "Denied access for %s", Selstr+1);
break;
" else if (result == SITE_TOOBUSY) -
Abortoutput(sockfd, "Sorry, too busy now...");
break;
"
/* see if index is type 1, which is a wais index */
Index_type = Find_index_type(Selstr+1);
if (Index_type == 1)
-
char waisfname[512]; /*** Ick this is gross ***/
strcpy(waisfname, Selstr+1);
if (strlen(waisfname) <= 4 __
strncmp(&waisfname[strlen(waisfname)-4],".src",4) )
strcat(waisfname, ".src");
SearchRemoteWAIS(sockfd, waisfname, cmd, view);
"
else
-
Do_IndexTrans(sockfd, Selstr+1, cmd, TRUE);
"
break;
"
o Then for mindex searches to work, edit gopher-dir/gopherd/mindexd.c and
comment out:
if (strcmp(slaves[i].host, "localhost") == 0 __
strcasecmp(slaves[i].host, Zehostname) == 0) -
CMDsetSelstr(cmd, GSgetPath(gs));
CMDsetSearch(cmd, queryline);
CMDsetGplus(cmd, FALSE);
Do_IndexTrans(sockfd, slaves[i].pathname+1, cmd, FALSE);
" else -
I also commented out the associated closing } with that paragraph a little over 30
lines down.
o In function do_mindexd(sockfd, config_filename, search, isgplus,
view): Between the two lines
HandleQuery(sockfd, search);
close(sockfd);
added:
LOGGopher(sockfd, "mindex search using %s.mindex for %s",
config_filename,
search);
There is also a bug in gopher-dir/gopherd/waisgopher.c As it stands, if you
do a search using Path=waissrc:..., and search is empty, server does not return
a '.', leaving old clients hanging
To #x, found the line (near or on line 557)
writestring(sockfd, "."r"n");
and moved it to after the second to last curly brace of that procedure call. In other
words, at the end of this procedure:
Mydisplay_text_record_completely( info->Text[k++], false, sockfd);
"
"
"
"
became
Mydisplay_text_record_completely( info->Text[k++], false, sockfd);
"
"
"
writestring(sockfd, "."r"n");
"
o Some additional enhancements to gopher-dir/gopherd/mindexd.c were made
as well to make it more robust and handle connections that time out. They are not
documented here; see the patch for details.
10 Special needs
10.1 Increasing the index block size (by Steve Hsieh)
In order to increase the index block size, so that words that appear many many times are
indexed:
o In freewais-sf-dir/ir/irfiles.h change
#else
#define INDEX_BLOCK_SIZE_SIZE 2
#endif
to
#else
#define INDEX_BLOCK_SIZE_SIZE 3
#endif
o In freewais-sf-dir/ir/server.h change
#define BUFSZ 100000 /* size of our comm buffer */
to
#define BUFSZ 1000000 /* size of our comm buffer */
o In freewais-sf-dir/ui/waissearch.c Change
#define MAX_MESSAGE_LEN 100000
to
#define MAX_MESSAGE_LEN BUFSZ
The last step will be obsolet in version > 1:0.
11 TODO
Here is a somewhat adhoc list of things to #x and features to add:
X11R6 Some might have noticed that the X clients do not (yet) compile with the new X11
release. Porting should not be too dif#cult for someone with some X11 Knowledge
ANSI Code currently does not pass a strikt ANSI Compiler. We intend to switch to the
Prototyping scheme known from the WWW library:
#ifdef __STDC__
#define ARGS1(t,a) "
(t a)
#else /* not ANSI */
#define ARGS1(t,a) (a) "
t a;
#endif /* __STDC__ (ANSI) */
waisindex BUGS
#lenames Waisindex has still problems with #lenames. E.g. #les with apostophes
or asterics in them are not handled properly. Filenames with wildcards may
enter the #lename table despite the fact, that they do not exists.
-a The -a #ag is not handled properly. Adding a #le, which contains only a subset
of the declared #elds causes the other #elds to be ignored by the server until a
#complete# document is added.
Compressed Indexes There are several know methods for compressing inverted #les which
could save us disc space and signi#catly improve search speed.
Spatial Indexes (Notes from Doug Nebert)
We would like to add a #eld type into the SF software which would allow for the
parsing of and indexing of geographic coordinates that describe the outline of a data
set or document. Software has been written outside of SF to do the parsing (using
#ex), and the indexing and overlay routines have been included into the freeWAIS-0.3
code. Now we need to integrate the code so that we can perform full #eld searching
of text, dates, numbers, and geography in one indexing system.
Forms (Notes from Doug Nebert)
It seems to me that if the SF crowd can consistently use the .fde #le incorporated into
the available .src #le that a functionality like "explain" can be developed to allow the
client to determine what attributes are being used and formulate a query window to
match it. probably easier would be to have a "form" resource #le which could be
retrieved from the server (e.g. query.html) by a "smart" http client...
Relevance Feedback Notice, that the thing build in freeWAIS* is not #Relevance Feed-
back#. It is rathersome kind of query expansion. Real Relevance Feedback is proved
to produce much more effective ranking.
update (Notes from Marc Edgar)
How about having a script that could automatically update a the database. That is, a
record would be kept of which #les were in the database. This record (.rec or some
such) could be used instead of having to remember or #nd the command that created
it. That is, it would support something like,
waisindex -update filename.rec
to rebuild the database.
format #les (Notes from Marc Edgar)
Programs like this become immortal when they do not take any special knowlege to
use. Format #les for common data types would make FreeWAIS-sf more accessible.
Maybe you've already done this but format #les like, FAQ.fmt, email.fmt, usenet.fmt
would be very helpful, (and probably not that hard to write.) Maybe creating an
incoming directory on your ftp server would be useful, so that users could post their
.fmt #les and save you from having to do the work.
Z39.50 V2 (Notes from Doug Nebert)
It seems that the functionality you have provided matches very well the basic abilities
of Z39.50 V2 and V3 in terms of #elds and search. If there were a way to identify
registered attributes then the construction of a gateway from ZDIST to an FreeWAIS-
sf store of data would be possible, allowing people to keep their data in one format
and serve the V1 and non V1 communities.
My thoughts regarding a linkage between FreeWAIS-sf and a full Z39.50 V2-3
release such as ZDIST were to provide a link into the new capabilities and other
"compliant" clients out there. But I think much of the API work could be done with
the help of CNIDR personnel # their "linkage" back into freeWAIS-0.3 disabled some
of the functionality whereas FreeWAIS-sf is more on the same level of sophistication
as V2 and should be easier to connect to. If such a connection can be made it would
allow you all to maintain and enhance the existing code and have some partners
out here work on maintaining the API connection, taking the load off you except in
consultation : : :
Fields Note from Alberto Accomazzi (Darin McKeever proposed similar features).
First of all, when indexing the documents, the user should be able to specify the
following for each #eld to be indexed:
o minimum word length
o set of characters composing the terms # i.e. the delimiter set
o synonym #le
o stopword #le
This could be done by allowing the entries in the format #le to look like:
/^Authors: /
au TEXT BOTH minchars 2 word /[^ ;"n=()]+/
stop abstracts_field_au.stop syn abstracts_field_syn.syn
Other things such as headline length should be speci#able in the .fmt #le as well.
Documentation Counting the mails I receive every day leads to the conclusion that there
is a lack of documentation.
man The online manuals are out of date.
document specs Many people have dif#culties in building document speci#cations.
Either there should be a nicer input format or someone should provide a compiler
(+checking and testing?) for some prettier speci#cation format.
other systems There should be more info on: How do i use FreeWAIS-sf with
Gopher, Mosaic, httpd, perl, : : :
: : :
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