<!ENTITY % idcommon SYSTEM "common/common.ent">
%idcommon;
]>
-<!-- $Id: book.xml,v 1.18 2007-06-20 07:41:58 adam Exp $ -->
<book id="book">
<bookinfo>
<title>Pazpar2 - User's Guide and Reference</title>
<author>
<firstname>Marc</firstname><surname>Cromme</surname>
</author>
+ <author>
+ <firstname>Jakub</firstname><surname>Skoczen</surname>
+ </author>
<releaseinfo>&version;</releaseinfo>
<copyright>
<year>©right-year;</year>
</copyright>
<abstract>
<simpara>
- Pazpar2 is a high-performance, user interface-independent, data
- model-independent metasearching
- middle-ware featuring merging, relevance ranking, record sorting,
+ Pazpar2 is a high-performance metasearch engine featuring
+ merging, relevance ranking, record sorting,
and faceted results.
+ It is middleware: it has no user interface of its own, but can be
+ configured and controlled by an XML-over-HTTP web-service to provide
+ metasearching functionality behind any user interface.
</simpara>
<simpara>
- This document is a guide and reference to Pazpar version &version;.
+ This document is a guide and reference to Pazpar2 version &version;.
</simpara>
<simpara>
<inlinemediaobject>
<chapter id="introduction">
<title>Introduction</title>
<para>
- Pazpar2 is a stand-alone metasearch client with a web-service API, designed
- to be used either from a browser-based client (JavaScript, Flash, Java,
- etc.), from from server-side code, or any combination of the two.
+ Pazpar2 is a stand-alone metasearch engine with a web-service API, designed
+ to be used either from a browser-based client (JavaScript, Flash,
+ Java applet,
+ etc.), from server-side code, or any combination of the two.
Pazpar2 is a highly optimized client designed to
search many resources in parallel. It implements record merging,
relevance-ranking and sorting by arbitrary data content, and facet
- analysis for browsing purposes. It is designed to be data model
+ analysis for browsing purposes. It is designed to be data-model
independent, and is capable of working with MARC, DublinCore, or any
other <ulink url="&url.xml;">XML</ulink>-structured response format
-- <ulink url="&url.xslt;">XSLT</ulink> is used to normalize and extract
data from retrieval records for display and analysis. It can be used
against any server which supports the
- <ulink url="&url.z39.50;">Z39.50</ulink> protocol. Proprietary
- backend modules can be used to support a large number of other protocols
+ <ulink url="&url.z39.50;">Z39.50</ulink> or <ulink url="&url.sru;">SRU/SRW</ulink>
+ protocol. Proprietary
+ backend modules can function as connectors between these standard
+ protocols and any non-standard API, including web-site scraping, to
+ support a large number of other protocols
(please contact Index Data for further information about this).
</para>
<para>
Additional functionality such as
- user management, attractive displays are expected to be implemented by
- applications that use Pazpar2. Pazpar2 is user interface independent.
- Its functionality is exposed through a simple REST-style web-service API,
- designed to be simple to use from an Ajax-enabled browser, Flash
+ user management and attractive displays are expected to be implemented by
+ applications that use Pazpar2. Pazpar2 itself is user-interface independent.
+ Its functionality is exposed through a simple XML RPC web-service API,
+ designed to be easy to use from an AJAX-enabled browser, Flash
animation, Java applet, etc., or from a higher-level server-side language
- like PHP or Java. Because session information can be shared between
- browser-based logic and your server-side scripting, there is tremendous
- flexibility in how you implement your business logic on top of Pazpar2.
+ like PHP, Perl or Java. Because session information can be shared between
+ browser-based logic and server-side scripting, there is tremendous
+ flexibility in how you implement application-specific logic on top
+ of Pazpar2.
</para>
<para>
Once you launch a search in Pazpar2, the operation continues behind the
scenes. Pazpar2 connects to servers, carries out searches, and
retrieves, deduplicates, and stores results internally. Your application
code may periodically inquire about the status of an ongoing operation,
- and ask to see records or other result set facets. Result become
- available immediately, and it is easy to build end-user interfaces which
+ and ask to see records or result set facets. Results become
+ available immediately, and it is easy to build end-user interfaces than
feel extremely responsive, even when searching more than 100 servers
concurrently.
</para>
normalized to XML/UTF-8, and then further normalized using XSLT to a
simple internal representation that is suitable for analysis. By
providing XSLT stylesheets for different kinds of result records, you
- can tune Pazpar2 to work against different kinds of information
- retrieval servers. Finally, metadata is extracted, in a configurable
- way, from this internal record, to support display, merging, ranking,
+ can configure Pazpar2 to work against different kinds of information
+ retrieval servers. Finally, metadata is extracted in a configurable
+ way from this internal record, to support display, merging, ranking,
result set facets, and sorting. Pazpar2 is not bound to a specific model
- of metadata, such as DublinCore or MARC -- by providing the right
- configuration, it can work with a number of different kinds of data in
+ of metadata, such as DublinCore or MARC: by providing the right
+ configuration, it can work with any combination of different kinds of data in
support of many different applications.
</para>
<para>
search several hundred targets in parallel, or you can use it to support
hundreds of concurrent users. It is implemented with the same attention
to performance and economy that we use in our indexing engines, so that
- you can focus on building your application, without worrying about the
+ you can focus on building your application without worrying about the
details of metasearch logic. You can devote all of your attention to
usability and let Pazpar2 do what it does best -- metasearch.
</para>
<para>
If you wish to connect to commercial or other databases which do not
- support open standards, please contact Index Data. We have a licensing
- agreement with a third party vendor which will enable Pazpar2 to access
- thousands of online databases, in addition the vast number of catalogs
- and online services that support the Z39.50 protocol.
+ support open standards, please contact Index Data. We have a
+ proprietary framework for building connectors that enable Pazpar2
+ to access
+ thousands of online databases, in addition to the vast number of catalogs
+ and online services that support the Z39.50/SRU/SRW protocols.
</para>
<para>
Pazpar2 is our attempt to re-think the traditional paradigms for
Enjoy!
</para>
<para>
- Pazpar2 is covered by the GNU license version 2.
+ Pazpar2 is covered by the GNU General Public License (GPL) version 2.
See <xref linkend="license"/> for further information.
</para>
</chapter>
<chapter id="installation">
<title>Installation</title>
<para>
+ The Pazpar2 package is very small. It includes documentation as well
+ as the Pazpar2 server. The package also includes a simple user
+ interface test1 which consists of a single HTML page and a single
+ JavaScript file to illustrate the use of Pazpar2.
+ </para>
+ <para>
Pazpar2 depends on the following tools/libraries:
<variablelist>
<varlistentry><term><ulink url="&url.yaz;">YAZ</ulink></term>
<listitem>
<para>
- The popular Z39.50 toolkit for the C language. YAZ must be
- compiled with Libxml2/Libxslt support.
+ The popular Z39.50 toolkit for the C language.
+ YAZ <emphasis>must</emphasis> be compiled with Libxml2/Libxslt support.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
<para>
- In order to compile Pazpar2 an ANSI C compiler is
- required. The requirements should be the same as for YAZ.
+ In order to compile Pazpar2, a C compiler which supports C99 or later
+ is required.
</para>
<section id="installation.unix">
The latest source code for Pazpar2 is available from
<ulink url="&url.pazpar2.download;"/>.
Only few systems have none of the required
- tools binary packages. If, for example, Libxml2/libXSLT are already
- installed as development packages use these.
+ tools binary packages.
+ If, for example, Libxml2/libXSLT libraries
+ are already installed as development packages use these.
</para>
<para>
su
make install
</screen>
+ <para>
+ The <literal>make install</literal> will install manpages as well as the
+ Pazpar2 server, <literal>pazpar2</literal>,
+ in PREFIX<literal>/sbin</literal>.
+ By default, PREFIX is <literal>/usr/local/</literal> . This can be
+ changed with configure option <option>--prefix</option>.
+ </para>
+ </section>
+
+ <section id="installation.win32">
+ <title>Installation on Windows (from Source)</title>
+ <para>
+ Pazpar2 can be built for Windows using
+ <ulink url="&url.vstudio;">Microsoft Visual Studio</ulink>.
+ The support files for building YAZ on Windows are located in the
+ <filename>win</filename> directory. The compilation is performed
+ using the <filename>win/makefile</filename> which is to be
+ processed by the NMAKE utility part of Visual Studio.
+ </para>
+ <para>
+ Ensure that the development libraries + header files are
+ available on your system before compiling Pazpar2. For installation
+ of YAZ, refer to the YAZ installation chapter.
+ It is easiest if YAZ and Pazpar2 are unpacked in the same
+ directory (side-by-side).
+ </para>
+ <para>
+ The compilation is tuned by editing the makefile of Pazpar2.
+ The process is similar to YAZ. Adjust the various directories
+ <literal>YAZ_DIR</literal>, <literal>ZLIB_DIR</literal>, ..
+ </para>
+ <para>
+ Compile Pazpar2 by invoking <application>nmake</application> in
+ the <filename>win</filename> directory.
+ The resulting binaries of the build process are located in the
+ <filename>bin</filename> of the Pazpar2 source
+ tree - including the <filename>pazpar2.exe</filename> and necessary DLLs.
+ </para>
+ <para>
+ The Windows version of Pazpar2 is a console application. It may
+ be installed as a Windows Service by adding option
+ <literal>-install</literal> for the pazpar2 program. This will
+ register Pazpar2 as a service and use the other options provided
+ in the same invocation. For example:
+ <screen>
+ cd \MyPazpar2\etc
+ ..\bin\pazpar2 -install -f pazpar2.cfg -l pazpar2.log
+ </screen>
+ The Pazpar2 service may now be controlled via the Service Control
+ Panel. It may be unregistered by passing the <literal>-remove</literal>
+ option. Example:
+ <screen>
+ cd \MyPazpar2\etc
+ ..\bin\pazpar2 -remove
+ </screen>
+ </para>
+ </section>
+
+ <section id="installation.test1">
+ <title>Installation of test1 interface</title>
+ <para>
+ In this section we outline how to install a simple interface that
+ is part of the Pazpar2 source package. Note that Debian users can
+ save time by just installing package <literal>pazpar2-test1</literal>.
+ </para>
+ <para>
+ A web server must be installed and running on the system, such as Apache.
+ </para>
+
+ <para>
+ Start the Pazpar2 daemon using the 'in-source' binary of the Pazpar2
+ daemon. On Unix the process is:
+ <screen>
+ cd etc
+ cp pazpar2.cfg.dist pazpar2.cfg
+ ../src/pazpar2 -f pazpar2.cfg
+ </screen>
+ And on Windows:
+ <screen>
+ cd etc
+ copy pazpar2.cfg.dist pazpar2.cfg
+ ..\bin\pazpar2 -f pazpar2.cfg
+ </screen>
+ This will start a Pazpar2 listener on port 9004. It will proxy
+ HTTP requests to localhost - port 80, which we assume will be the regular
+ HTTP server on the system. Inspect and modify pazpar2.cfg as needed
+ if this is to be changed. The pazpar2.cfg includes settings from the
+ file <filename>settings/edu.xml</filename>
+ to use for searches.
+ </para>
+ <para>
+ Make a new console and move to the other stuff.
+ For more information about pazpar2 options refer to the manpage.
+ </para>
+
+ <para>
+ The test1 UI is located in <literal>www/test1</literal>. Ensure this
+ directory is available to the web server by either copying
+ <literal>test1</literal> to the document root, create a symlink or
+ use Apache's <literal>Alias</literal> directive.
+ </para>
+
+ <para>
+ The interface test1 interface should now be available on port 8004.
+ </para>
+ <para>
+ If you don't see the test1 interface. See if test1 is really available
+ on the same URL but on port 80. If it's not, the Apache configuration
+ (or other) is not correct.
+ </para>
+ <para>
+ In order to use Apache as frontend for the interface on port 80
+ for public access etc., refer to
+ <xref linkend="installation.apache2proxy"/>.
+ </para>
</section>
<section id="installation.debian">
<para>
Index Data provides Debian packages for Pazpar2. These are prepared
for Debian versions Etch and Lenny (as of 2007).
- Theses packages are available at
+ These packages are available at
<ulink url="&url.pazpar2.download.debian;"/>.
</para>
</section>
possible to combine Pazpar2 either with your server-side dynamic
website scripting, with scripting or code running in the browser, or
with any combination of the two. Pazpar2 is an excellent tool for
- building advanced, Ajax-based user interfaces for metasearch
+ building advanced, AJAX-based user interfaces for metasearch
functionality, but it isn't a requirement -- you can choose to use
Pazpar2 entirely as a backend to your regular server-side scripting.
When you do use Pazpar2 in conjunction
- with browser scripting (JavaScript/Ajax, Flash, applets,
+ with browser scripting (JavaScript/AJAX, Flash, applets,
etc.), there are special considerations.
</para>
Sometimes, it may be necessary to implement functionality on your
regular webserver that makes use of search results, for example to
implement data import functionality, emailing results, history
- lists, personal citation lists, interlibrary loan functionality
- ,etc. Fortunately, it is simple to exchange information between
+ lists, personal citation lists, interlibrary loan functionality,
+ etc. Fortunately, it is simple to exchange information between
Pazpar2, your browser scripting, and backend server-side scripting.
You can send a session ID and possibly a record ID from your browser
code to your server code, and from there use Pazpar2s webservice API
<title>Your data model</title>
<para>
Pazpar2 does not have a preconceived model of what makes up a data
- model. There are no assumption that records have specific fields or
+ model. There are no assumptions that records have specific fields or
that they are organized in any particular way. The only assumption
is that data comes packaged in a form that the software can work
with (presently, that means XML or MARC), and that you can provide
you decide which data elements of the source record you are
interested in, and you specify any desired massaging or combining of
elements using an XSLT stylesheet (MARC records are automatically
- normalized to MARCXML before this step). If desired, you can run
- multiple XSLT stylesheets in series to accomplish this, but the
- output of the last one should be a representation of the record in a
- schema that Pazpar2 understands.
+ normalized to <ulink url="&url.marcxml;">MARCXML</ulink> before this step).
+ If desired, you can run multiple XSLT stylesheets in series to accomplish
+ this, but the output of the last one should be a representation of the
+ record in a schema that Pazpar2 understands.
</para>
<para>
<para>
You can use Pazpar2 from any environment that allows you to use
webservices. The initial goal of the software was to support
- Ajax-based applications, but there literally are no limits to what
+ AJAX-based applications, but there literally are no limits to what
you can do. You can use Pazpar2 from Javascript, Flash, Java, etc.,
on the browser side, and from any development environment on the
server side, and you can pass session tokens and record IDs freely
</para>
</section>
+ §-ajaxdev;
+
<section id="nonstandard">
<title>Connecting to non-standard resources</title>
<para>
Pazpar2 uses Z39.50 as its switchboard language -- i.e. as far as it
- is concerned, all resources speak Z39.50. It is, however, equipped
+ is concerned, all resources speak Z39.50, or its webservices derivatives,
+ SRU/SRW. It is, however, equipped
to handle a broad range of different server behavior, through
configurable query mapping and record normalization. If you develop
configuration, stylesheets, etc., for a new type of resources, we
</para>
<para>
- But what about resources that don't support Z39.50 at all? The NISO
- SRU (MXG) protocol is slowly gathering steam. Other resources might
+ But what about resources that don't support Z39.50 at all? Some resources might
support OpenSearch, private, XML/HTTP-based protocols, or something
else entirely. Some databases exist only as web user interfaces and
will require screen-scraping. Still others exist only as static
</para>
</section>
+ <section id="load_balancing">
+ <title>Load balancing</title>
+ <para>
+ Just like any web server, Pazpar2, can be load balanced by a standard hardware or software load balancer as long as the session stickiness is ensured. If you are already running the Apache2 web server in front of Pazpar2 and use the apache mod_proxy module to 'relay' client requests to Pazpar2, this set up can be easily extended to include load balancing capabilites. To do so you need to enable the <ulink url="http://httpd.apache.org/docs/2.2/mod/mod_proxy_balancer.html">
+ mod_proxy_balancer
+ </ulink> module in your Apache2 installation.
+ </para>
+
+ <para>
+ On a Debian based Apache 2 system, the relevant modules can
+ be enabled with:
+ <screen>
+ sudo a2enmod proxy_http
+ </screen>
+ </para>
+
+ <para>
+ The mod_proxy_balancer can pass all 'sessionsticky' requests to the same backend worker as long as the requests are marked with the originating worker's ID (called 'route'). If the Pazpar2 serverID is configured (by setting an 'id' attribute on the 'server' element in the Pazpar2 configuration file) Pazpar2 will append it to the 'session' element returned during the 'init' in a mod_proxy_balancer compatible manner. Since the 'session' is then re-sent by the client (for all pazpar2 request besides 'init'), the balancer can use the marker to pass the request to the right route. To do so the balancer needs to be configured to inspect the 'session' parameter.
+ </para>
+
+ <example id="load_balancing.example">
+ <title>Apache 2 load balancing configuration</title>
+ <para>
+ Having 4 Pazpar2 instances running on the same host, port range of 8004-8007 and serverIDs of: pz1, pz2, pz3 and pz4 respectively we could use the following Apache 2 configuration to expose a single pazpar2 'endpoint' on a standard (<filename>/pazpar2/search.pz2</filename>) location:
+
+ <screen><![CDATA[
+ <Proxy *>
+ AddDefaultCharset off
+ Order deny,allow
+ Allow from all
+ </Proxy>
+ ProxyVia Off
+
+ # 'route' has to match the configured pazpar2 server ID
+ <Proxy balancer://pz2cluster>
+ BalancerMember http://localhost:8004 route=pz1
+ BalancerMember http://localhost:8005 route=pz2
+ BalancerMember http://localhost:8006 route=pz3
+ BalancerMember http://localhost:8007 route=pz4
+ </Proxy>
+
+ # route is resent in the 'session' param which has the form:
+ # 'sessid.serverid', understandable by the mod_proxy_load_balancer
+ # this is not going to work if the client tampers with the 'session' param
+ ProxyPass /pazpar2/search.pz2 balancer://pz2cluster lbmethod=byrequests stickysession=session nofailover=On]]></screen>
+
+ The 'ProxyPass' line sets up a reverse proxy for request ‘/pazpar2/search.pz2’ and delegates all requests to the load balancer (virtual worker) with name ‘pz2cluster’. Sticky sessions are enabled and implemented using the ‘session’ parameter. The ‘Proxy’ section lists all the servers (real workers) which the load balancer can use.
+ </para>
+
+ </example>
+
+ </section>
+
+
</chapter> <!-- Using Pazpar2 -->
<reference id="reference">
<appendix id="license"><title>License</title>
- <section id="gpl"><title>GPL</title>
-
<para>
Pazpar2,
Copyright © ©right-year; Index Data.
<para>
You should have received a copy of the GNU General Public License
along with Pazpar2; see the file LICENSE. If not, write to the
- Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
- 02111-1307, USA.
+ Free Software Foundation,
+ 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
</para>
-
- <screen>
- GNU GENERAL PUBLIC LICENSE
- Version 2, June 1991
-
- Copyright (C) 1989, 1991 Free Software Foundation, Inc.
- 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- Everyone is permitted to copy and distribute verbatim copies
- of this license document, but changing it is not allowed.
-
- Preamble
-
- The licenses for most software are designed to take away your
-freedom to share and change it. By contrast, the GNU General Public
-License is intended to guarantee your freedom to share and change free
-software--to make sure the software is free for all its users. This
-General Public License applies to most of the Free Software
-Foundation's software and to any other program whose authors commit to
-using it. (Some other Free Software Foundation software is covered by
-the GNU Library General Public License instead.) You can apply it to
-your programs, too.
-
- When we speak of free software, we are referring to freedom, not
-price. Our General Public Licenses are designed to make sure that you
-have the freedom to distribute copies of free software (and charge for
-this service if you wish), that you receive source code or can get it
-if you want it, that you can change the software or use pieces of it
-in new free programs; and that you know you can do these things.
-
- To protect your rights, we need to make restrictions that forbid
-anyone to deny you these rights or to ask you to surrender the rights.
-These restrictions translate to certain responsibilities for you if you
-distribute copies of the software, or if you modify it.
-
- For example, if you distribute copies of such a program, whether
-gratis or for a fee, you must give the recipients all the rights that
-you have. You must make sure that they, too, receive or can get the
-source code. And you must show them these terms so they know their
-rights.
-
- We protect your rights with two steps: (1) copyright the software, and
-(2) offer you this license which gives you legal permission to copy,
-distribute and/or modify the software.
-
- Also, for each author's protection and ours, we want to make certain
-that everyone understands that there is no warranty for this free
-software. If the software is modified by someone else and passed on, we
-want its recipients to know that what they have is not the original, so
-that any problems introduced by others will not reflect on the original
-authors' reputations.
-
- Finally, any free program is threatened constantly by software
-patents. We wish to avoid the danger that redistributors of a free
-program will individually obtain patent licenses, in effect making the
-program proprietary. To prevent this, we have made it clear that any
-patent must be licensed for everyone's free use or not licensed at all.
-
- The precise terms and conditions for copying, distribution and
-modification follow.
-
- GNU GENERAL PUBLIC LICENSE
- TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
-
- 0. This License applies to any program or other work which contains
-a notice placed by the copyright holder saying it may be distributed
-under the terms of this General Public License. The "Program", below,
-refers to any such program or work, and a "work based on the Program"
-means either the Program or any derivative work under copyright law:
-that is to say, a work containing the Program or a portion of it,
-either verbatim or with modifications and/or translated into another
-language. (Hereinafter, translation is included without limitation in
-the term "modification".) Each licensee is addressed as "you".
-
-Activities other than copying, distribution and modification are not
-covered by this License; they are outside its scope. The act of
-running the Program is not restricted, and the output from the Program
-is covered only if its contents constitute a work based on the
-Program (independent of having been made by running the Program).
-Whether that is true depends on what the Program does.
-
- 1. You may copy and distribute verbatim copies of the Program's
-source code as you receive it, in any medium, provided that you
-conspicuously and appropriately publish on each copy an appropriate
-copyright notice and disclaimer of warranty; keep intact all the
-notices that refer to this License and to the absence of any warranty;
-and give any other recipients of the Program a copy of this License
-along with the Program.
-
-You may charge a fee for the physical act of transferring a copy, and
-you may at your option offer warranty protection in exchange for a fee.
-
- 2. You may modify your copy or copies of the Program or any portion
-of it, thus forming a work based on the Program, and copy and
-distribute such modifications or work under the terms of Section 1
-above, provided that you also meet all of these conditions:
-
- a) You must cause the modified files to carry prominent notices
- stating that you changed the files and the date of any change.
-
- b) You must cause any work that you distribute or publish, that in
- whole or in part contains or is derived from the Program or any
- part thereof, to be licensed as a whole at no charge to all third
- parties under the terms of this License.
-
- c) If the modified program normally reads commands interactively
- when run, you must cause it, when started running for such
- interactive use in the most ordinary way, to print or display an
- announcement including an appropriate copyright notice and a
- notice that there is no warranty (or else, saying that you provide
- a warranty) and that users may redistribute the program under
- these conditions, and telling the user how to view a copy of this
- License. (Exception: if the Program itself is interactive but
- does not normally print such an announcement, your work based on
- the Program is not required to print an announcement.)
-
-These requirements apply to the modified work as a whole. If
-identifiable sections of that work are not derived from the Program,
-and can be reasonably considered independent and separate works in
-themselves, then this License, and its terms, do not apply to those
-sections when you distribute them as separate works. But when you
-distribute the same sections as part of a whole which is a work based
-on the Program, the distribution of the whole must be on the terms of
-this License, whose permissions for other licensees extend to the
-entire whole, and thus to each and every part regardless of who wrote it.
-
-Thus, it is not the intent of this section to claim rights or contest
-your rights to work written entirely by you; rather, the intent is to
-exercise the right to control the distribution of derivative or
-collective works based on the Program.
-
-In addition, mere aggregation of another work not based on the Program
-with the Program (or with a work based on the Program) on a volume of
-a storage or distribution medium does not bring the other work under
-the scope of this License.
-
- 3. You may copy and distribute the Program (or a work based on it,
-under Section 2) in object code or executable form under the terms of
-Sections 1 and 2 above provided that you also do one of the following:
-
- a) Accompany it with the complete corresponding machine-readable
- source code, which must be distributed under the terms of Sections
- 1 and 2 above on a medium customarily used for software interchange; or,
-
- b) Accompany it with a written offer, valid for at least three
- years, to give any third party, for a charge no more than your
- cost of physically performing source distribution, a complete
- machine-readable copy of the corresponding source code, to be
- distributed under the terms of Sections 1 and 2 above on a medium
- customarily used for software interchange; or,
-
- c) Accompany it with the information you received as to the offer
- to distribute corresponding source code. (This alternative is
- allowed only for noncommercial distribution and only if you
- received the program in object code or executable form with such
- an offer, in accord with Subsection b above.)
-
-The source code for a work means the preferred form of the work for
-making modifications to it. For an executable work, complete source
-code means all the source code for all modules it contains, plus any
-associated interface definition files, plus the scripts used to
-control compilation and installation of the executable. However, as a
-special exception, the source code distributed need not include
-anything that is normally distributed (in either source or binary
-form) with the major components (compiler, kernel, and so on) of the
-operating system on which the executable runs, unless that component
-itself accompanies the executable.
-
-If distribution of executable or object code is made by offering
-access to copy from a designated place, then offering equivalent
-access to copy the source code from the same place counts as
-distribution of the source code, even though third parties are not
-compelled to copy the source along with the object code.
-
- 4. You may not copy, modify, sublicense, or distribute the Program
-except as expressly provided under this License. Any attempt
-otherwise to copy, modify, sublicense or distribute the Program is
-void, and will automatically terminate your rights under this License.
-However, parties who have received copies, or rights, from you under
-this License will not have their licenses terminated so long as such
-parties remain in full compliance.
-
- 5. You are not required to accept this License, since you have not
-signed it. However, nothing else grants you permission to modify or
-distribute the Program or its derivative works. These actions are
-prohibited by law if you do not accept this License. Therefore, by
-modifying or distributing the Program (or any work based on the
-Program), you indicate your acceptance of this License to do so, and
-all its terms and conditions for copying, distributing or modifying
-the Program or works based on it.
-
- 6. Each time you redistribute the Program (or any work based on the
-Program), the recipient automatically receives a license from the
-original licensor to copy, distribute or modify the Program subject to
-these terms and conditions. You may not impose any further
-restrictions on the recipients' exercise of the rights granted herein.
-You are not responsible for enforcing compliance by third parties to
-this License.
-
- 7. If, as a consequence of a court judgment or allegation of patent
-infringement or for any other reason (not limited to patent issues),
-conditions are imposed on you (whether by court order, agreement or
-otherwise) that contradict the conditions of this License, they do not
-excuse you from the conditions of this License. If you cannot
-distribute so as to satisfy simultaneously your obligations under this
-License and any other pertinent obligations, then as a consequence you
-may not distribute the Program at all. For example, if a patent
-license would not permit royalty-free redistribution of the Program by
-all those who receive copies directly or indirectly through you, then
-the only way you could satisfy both it and this License would be to
-refrain entirely from distribution of the Program.
-
-If any portion of this section is held invalid or unenforceable under
-any particular circumstance, the balance of the section is intended to
-apply and the section as a whole is intended to apply in other
-circumstances.
-
-It is not the purpose of this section to induce you to infringe any
-patents or other property right claims or to contest validity of any
-such claims; this section has the sole purpose of protecting the
-integrity of the free software distribution system, which is
-implemented by public license practices. Many people have made
-generous contributions to the wide range of software distributed
-through that system in reliance on consistent application of that
-system; it is up to the author/donor to decide if he or she is willing
-to distribute software through any other system and a licensee cannot
-impose that choice.
-
-This section is intended to make thoroughly clear what is believed to
-be a consequence of the rest of this License.
-
- 8. If the distribution and/or use of the Program is restricted in
-certain countries either by patents or by copyrighted interfaces, the
-original copyright holder who places the Program under this License
-may add an explicit geographical distribution limitation excluding
-those countries, so that distribution is permitted only in or among
-countries not thus excluded. In such case, this License incorporates
-the limitation as if written in the body of this License.
-
- 9. The Free Software Foundation may publish revised and/or new versions
-of the General Public License from time to time. Such new versions will
-be similar in spirit to the present version, but may differ in detail to
-address new problems or concerns.
-
-Each version is given a distinguishing version number. If the Program
-specifies a version number of this License which applies to it and "any
-later version", you have the option of following the terms and conditions
-either of that version or of any later version published by the Free
-Software Foundation. If the Program does not specify a version number of
-this License, you may choose any version ever published by the Free Software
-Foundation.
-
- 10. If you wish to incorporate parts of the Program into other free
-programs whose distribution conditions are different, write to the author
-to ask for permission. For software which is copyrighted by the Free
-Software Foundation, write to the Free Software Foundation; we sometimes
-make exceptions for this. Our decision will be guided by the two goals
-of preserving the free status of all derivatives of our free software and
-of promoting the sharing and reuse of software generally.
-
- NO WARRANTY
-
- 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
-FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
-OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
-PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
-OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
-MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
-TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
-PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
-REPAIR OR CORRECTION.
-
- 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
-WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
-REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
-INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
-OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
-TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
-YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
-PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
-POSSIBILITY OF SUCH DAMAGES.
-
- END OF TERMS AND CONDITIONS
- </screen>
- </section>
+
</appendix>
+
+ &gpl2;
</book>
projects / pazpar2-moved-to-github.git / blobdiff