GNU LESSER GENERAL PUBLIC LICENSE 

			Version 2.1, February 1999 

 Copyright (C) 1991, 1999 Free Software Foundation, Inc. 

	51 Franklin St, Fifth Floor, Boston, MA	 02110-1301  USA 

 Everyone is permitted to copy and distribute verbatim copies 

 of this license document, but changing it is not allowed. 

[This is the first released version of the Lesser GPL.  It also counts 

 as the successor of the GNU Library Public License, version 2, hence 

 the version number 2.1.] 

                            Preamble 

  The licenses for most software are designed to take away your 

freedom to share and change it.  By contrast, the GNU General Public 

Licenses are intended to guarantee your freedom to share and change 

free software--to make sure the software is free for all its users. 

  This license, the Lesser General Public License, applies to some 

specially designated software packages--typically libraries--of the 

Free Software Foundation and other authors who decide to use it.  You 

can use it too, but we suggest you first think carefully about whether 

this license or the ordinary General Public License is the better 

strategy to use in any particular case, based on the explanations 

below. 

  When we speak of free software, we are referring to freedom of use, 

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 and use pieces of 

it in new free programs; and that you are informed that you can do 

these things. 

  To protect your rights, we need to make restrictions that forbid 

distributors to deny you these rights or to ask you to surrender these 

rights.  These restrictions translate to certain responsibilities for 

you if you distribute copies of the library or if you modify it. 

  For example, if you distribute copies of the library, whether gratis 

or for a fee, you must give the recipients all the rights that we gave 

you.  You must make sure that they, too, receive or can get the source 

code.  If you link other code with the library, you must provide 

complete object files to the recipients, so that they can relink them 

with the library after making changes to the library and recompiling 

it.  And you must show them these terms so they know their rights. 

  We protect your rights with a two-step method: (1) we copyright the 

library, and (2) we offer you this license, which gives you legal 

permission to copy, distribute and/or modify the library. 

  To protect each distributor, we want to make it very clear that 

there is no warranty for the free library.  Also, if the library is 

modified by someone else and passed on, the recipients should know 

that what they have is not the original version, so that the original 

author's reputation will not be affected by problems that might be 

introduced by others. 

  Finally, software patents pose a constant threat to the existence of 

any free program.  We wish to make sure that a company cannot 

effectively restrict the users of a free program by obtaining a 

restrictive license from a patent holder.  Therefore, we insist that 

any patent license obtained for a version of the library must be 

consistent with the full freedom of use specified in this license. 

  Most GNU software, including some libraries, is covered by the 

ordinary GNU General Public License.  This license, the GNU Lesser 

General Public License, applies to certain designated libraries, and 

is quite different from the ordinary General Public License.  We use 

this license for certain libraries in order to permit linking those 

libraries into non-free programs. 

  When a program is linked with a library, whether statically or using 

a shared library, the combination of the two is legally speaking a 

combined work, a derivative of the original library.  The ordinary 

General Public License therefore permits such linking only if the 

entire combination fits its criteria of freedom.  The Lesser General 

Public License permits more lax criteria for linking other code with 

the library. 

  We call this license the "Lesser" General Public License because it 

does Less to protect the user's freedom than the ordinary General 

Public License.  It also provides other free software developers Less 

of an advantage over competing non-free programs.  These disadvantages 

are the reason we use the ordinary General Public License for many 

libraries.  However, the Lesser license provides advantages in certain 

special circumstances. 

  For example, on rare occasions, there may be a special need to 

encourage the widest possible use of a certain library, so that it 

becomes a de-facto standard.  To achieve this, non-free programs must 

be allowed to use the library.  A more frequent case is that a free 

library does the same job as widely used non-free libraries.  In this 

case, there is little to gain by limiting the free library to free 

software only, so we use the Lesser General Public License. 

  In other cases, permission to use a particular library in non-free 

programs enables a greater number of people to use a large body of 

free software.  For example, permission to use the GNU C Library in 

non-free programs enables many more people to use the whole GNU 

operating system, as well as its variant, the GNU/Linux operating 

system. 

  Although the Lesser General Public License is Less protective of the 

users' freedom, it does ensure that the user of a program that is 

linked with the Library has the freedom and the wherewithal to run 

that program using a modified version of the Library. 

  The precise terms and conditions for copying, distribution and 

modification follow.  Pay close attention to the difference between a 

"work based on the library" and a "work that uses the library".  The 

former contains code derived from the library, whereas the latter must 

be combined with the library in order to run. 

                  GNU LESSER GENERAL PUBLIC LICENSE 

   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 

  0. This License Agreement applies to any software library or other 

program which contains a notice placed by the copyright holder or 

other authorized party saying it may be distributed under the terms of 

this Lesser General Public License (also called "this License"). 

Each licensee is addressed as "you". 

  A "library" means a collection of software functions and/or data 

prepared so as to be conveniently linked with application programs 

(which use some of those functions and data) to form executables. 

  The "Library", below, refers to any such software library or work 

which has been distributed under these terms.  A "work based on the 

Library" means either the Library or any derivative work under 

copyright law: that is to say, a work containing the Library or a 

portion of it, either verbatim or with modifications and/or translated 

straightforwardly into another language.  (Hereinafter, translation is 

included without limitation in the term "modification".) 

  "Source code" for a work means the preferred form of the work for 

making modifications to it.  For a library, 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 library. 

  Activities other than copying, distribution and modification are not 

covered by this License; they are outside its scope.  The act of 

running a program using the Library is not restricted, and output from 

such a program is covered only if its contents constitute a work based 

on the Library (independent of the use of the Library in a tool for 

writing it).  Whether that is true depends on what the Library does 

and what the program that uses the Library does. 

  1. You may copy and distribute verbatim copies of the Library's 

complete 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 distribute a copy of this License along with the 

Library. 

  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 Library or any portion 

of it, thus forming a work based on the Library, 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) The modified work must itself be a software library. 

    b) You must cause the files modified to carry prominent notices 

    stating that you changed the files and the date of any change. 

    c) You must cause the whole of the work to be licensed at no 

    charge to all third parties under the terms of this License. 

    d) If a facility in the modified Library refers to a function or a 

    table of data to be supplied by an application program that uses 

    the facility, other than as an argument passed when the facility 

    is invoked, then you must make a good faith effort to ensure that, 

    in the event an application does not supply such function or 

    table, the facility still operates, and performs whatever part of 

    its purpose remains meaningful. 

    (For example, a function in a library to compute square roots has 

    a purpose that is entirely well-defined independent of the 

    application.  Therefore, Subsection 2d requires that any 

    application-supplied function or table used by this function must 

    be optional: if the application does not supply it, the square 

    root function must still compute square roots.) 

These requirements apply to the modified work as a whole.  If 

identifiable sections of that work are not derived from the Library, 

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 Library, 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 Library. 

In addition, mere aggregation of another work not based on the Library 

with the Library (or with a work based on the Library) on a volume of 

a storage or distribution medium does not bring the other work under 

the scope of this License. 

  3. You may opt to apply the terms of the ordinary GNU General Public 

License instead of this License to a given copy of the Library.  To do 

this, you must alter all the notices that refer to this License, so 

that they refer to the ordinary GNU General Public License, version 2, 

instead of to this License.  (If a newer version than version 2 of the 

ordinary GNU General Public License has appeared, then you can specify 

that version instead if you wish.)  Do not make any other change in 

these notices. 

  Once this change is made in a given copy, it is irreversible for 

that copy, so the ordinary GNU General Public License applies to all 

subsequent copies and derivative works made from that copy. 

  This option is useful when you wish to copy part of the code of 

the Library into a program that is not a library. 

  4. You may copy and distribute the Library (or a portion or 

derivative of it, under Section 2) in object code or executable form 

under the terms of Sections 1 and 2 above provided that you 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. 

  If distribution of 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 satisfies the requirement to 

distribute the source code, even though third parties are not 

compelled to copy the source along with the object code. 

  5. A program that contains no derivative of any portion of the 

Library, but is designed to work with the Library by being compiled or 

linked with it, is called a "work that uses the Library".  Such a 

work, in isolation, is not a derivative work of the Library, and 

therefore falls outside the scope of this License. 

  However, linking a "work that uses the Library" with the Library 

creates an executable that is a derivative of the Library (because it 

contains portions of the Library), rather than a "work that uses the 

library".  The executable is therefore covered by this License. 

Section 6 states terms for distribution of such executables. 

  When a "work that uses the Library" uses material from a header file 

that is part of the Library, the object code for the work may be a 

derivative work of the Library even though the source code is not. 

Whether this is true is especially significant if the work can be 

linked without the Library, or if the work is itself a library.  The 

threshold for this to be true is not precisely defined by law. 

  If such an object file uses only numerical parameters, data 

structure layouts and accessors, and small macros and small inline 

functions (ten lines or less in length), then the use of the object 

file is unrestricted, regardless of whether it is legally a derivative 

work.  (Executables containing this object code plus portions of the 

Library will still fall under Section 6.) 

  Otherwise, if the work is a derivative of the Library, you may 

distribute the object code for the work under the terms of Section 6. 

Any executables containing that work also fall under Section 6, 

whether or not they are linked directly with the Library itself. 

  6. As an exception to the Sections above, you may also combine or 

link a "work that uses the Library" with the Library to produce a 

work containing portions of the Library, and distribute that work 

under terms of your choice, provided that the terms permit 

modification of the work for the customer's own use and reverse 

engineering for debugging such modifications. 

  You must give prominent notice with each copy of the work that the 

Library is used in it and that the Library and its use are covered by 

this License.  You must supply a copy of this License.  If the work 

during execution displays copyright notices, you must include the 

copyright notice for the Library among them, as well as a reference 

directing the user to the copy of this License.  Also, you must do one 

of these things: 

    a) Accompany the work with the complete corresponding 

    machine-readable source code for the Library including whatever 

    changes were used in the work (which must be distributed under 

    Sections 1 and 2 above); and, if the work is an executable linked 

    with the Library, with the complete machine-readable "work that 

    uses the Library", as object code and/or source code, so that the 

    user can modify the Library and then relink to produce a modified 

    executable containing the modified Library.  (It is understood 

    that the user who changes the contents of definitions files in the 

    Library will not necessarily be able to recompile the application 

    to use the modified definitions.) 

    b) Use a suitable shared library mechanism for linking with the 

    Library.  A suitable mechanism is one that (1) uses at run time a 

    copy of the library already present on the user's computer system, 

    rather than copying library functions into the executable, and (2) 

    will operate properly with a modified version of the library, if 

    the user installs one, as long as the modified version is 

    interface-compatible with the version that the work was made with. 

    c) Accompany the work with a written offer, valid for at least 

    three years, to give the same user the materials specified in 

    Subsection 6a, above, for a charge no more than the cost of 

    performing this distribution. 

    d) If distribution of the work is made by offering access to copy 

    from a designated place, offer equivalent access to copy the above 

    specified materials from the same place. 

    e) Verify that the user has already received a copy of these 

    materials or that you have already sent this user a copy. 

  For an executable, the required form of the "work that uses the 

Library" must include any data and utility programs needed for 

reproducing the executable from it.  However, as a special exception, 

the materials to be 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. 

  It may happen that this requirement contradicts the license 

restrictions of other proprietary libraries that do not normally 

accompany the operating system.  Such a contradiction means you cannot 

use both them and the Library together in an executable that you 

distribute. 

  7. You may place library facilities that are a work based on the 

Library side-by-side in a single library together with other library 

facilities not covered by this License, and distribute such a combined 

library, provided that the separate distribution of the work based on 

the Library and of the other library facilities is otherwise 

permitted, and provided that you do these two things: 

    a) Accompany the combined library with a copy of the same work 

    based on the Library, uncombined with any other library 

    facilities.  This must be distributed under the terms of the 

    Sections above. 

    b) Give prominent notice with the combined library of the fact 

    that part of it is a work based on the Library, and explaining 

    where to find the accompanying uncombined form of the same work. 

  8. You may not copy, modify, sublicense, link with, or distribute 

the Library except as expressly provided under this License.  Any 

attempt otherwise to copy, modify, sublicense, link with, or 

distribute the Library 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. 

  9. 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 Library or its derivative works.  These actions are 

prohibited by law if you do not accept this License.  Therefore, by 

modifying or distributing the Library (or any work based on the 

Library), you indicate your acceptance of this License to do so, and 

all its terms and conditions for copying, distributing or modifying 

the Library or works based on it. 

  10. Each time you redistribute the Library (or any work based on the 

Library), the recipient automatically receives a license from the 

original licensor to copy, distribute, link with or modify the Library 

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 with 

this License. 

  11. 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 Library at all.  For example, if a patent 

license would not permit royalty-free redistribution of the Library 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 Library. 

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. 

  12. If the distribution and/or use of the Library is restricted in 

certain countries either by patents or by copyrighted interfaces, the 

original copyright holder who places the Library 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. 

  13. The Free Software Foundation may publish revised and/or new 

versions of the Lesser 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 Library 

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 Library does not specify a 

license version number, you may choose any version ever published by 

the Free Software Foundation. 

  14. If you wish to incorporate parts of the Library into other free 

programs whose distribution conditions are incompatible with these, 

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 

  15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO 

WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW. 

EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR 

OTHER PARTIES PROVIDE THE LIBRARY "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 

LIBRARY IS WITH YOU.  SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME 

THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 

  16. 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 LIBRARY 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 

LIBRARY (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 LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF 

SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH 

DAMAGES. 

                     END OF TERMS AND CONDITIONS 

           How to Apply These Terms to Your New Libraries 

  If you develop a new library, and you want it to be of the greatest 

possible use to the public, we recommend making it free software that 

everyone can redistribute and change.  You can do so by permitting 

redistribution under these terms (or, alternatively, under the terms 

of the ordinary General Public License). 

  To apply these terms, attach the following notices to the library. 

It is safest to attach them to the start of each source file to most 

effectively convey the exclusion of warranty; and each file should 

have at least the "copyright" line and a pointer to where the full 

notice is found. 

    <one line to give the library's name and a brief idea of what it does.> 

    Copyright (C) <year>  <name of author> 

    This library is free software; you can redistribute it and/or 

    modify it under the terms of the GNU Lesser General Public 

    License as published by the Free Software Foundation; either 

    version 2.1 of the License, or (at your option) any later version. 

    This library is distributed in the hope that it will be useful, 

    but WITHOUT ANY WARRANTY; without even the implied warranty of 

    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU 

    Lesser General Public License for more details. 

    You should have received a copy of the GNU Lesser General Public 

    License along with this library; if not, write to the Free Software 

    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA 

Also add information on how to contact you by electronic and paper mail. 

You should also get your employer (if you work as a programmer) or 

your school, if any, to sign a "copyright disclaimer" for the library, 

if necessary.  Here is a sample; alter the names: 

  Yoyodyne, Inc., hereby disclaims all copyright interest in the 

  library `Frob' (a library for tweaking knobs) written by James 

  Random Hacker. 

  <signature of Ty Coon>, 1 April 1990 

  Ty Coon, President of Vice 

That's all there is to it!