Skip to content
Permalink
Branch: master
Find file Copy path
Find file Copy path
1 contributor

Users who have contributed to this file

875 lines (704 sloc) 35.7 KB

Windows Event Viewer Log (EVT) format

Summary

The Windows Event Log (EVT) format is used by Microsoft Windows to store system log information. This specification is based on public available information and was enhanced by analyzing test data.

This document is intended as a working document for the Windows Event Log (EVT) specification. Which should allow existing Open Source forensic tooling to be able to process this file type.

Document information

Author(s):

Joachim Metz <joachim.metz@gmail.com>

Abstract:

This document contains information about the Windows Event Viewer Log (EVT) format.

Classification:

Public

Keywords:

Windows Event Viewer Log, EVT

License

Copyright (C) 2011-2019, Joachim Metz <joachim.metz@gmail.com>.
Permission is granted to copy, distribute and/or modify this document under the
terms of the GNU Free Documentation License, Version 1.3 or any later version
published by the Free Software Foundation; with no Invariant Sections, no
Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included
in the section entitled "GNU Free Documentation License".

Revision history

Version Author Date Comments

0.0.1

J.B. Metz

October 2011

Initial version.

0.0.2

J.B. Metz

March 2012

Additional information.

0.0.3

J.B. Metz

May 2012

Additional information.

0.0.4

J.B. Metz

August 2012

Additional information regarding event categories.

0.0.5

J.B. Metz

September 2012

Additional information regarding behavior of offset in record.

0.0.6

J.B. Metz

October 2012

Additional information.

0.0.7

J.B. Metz

November 2012

Additional information regarding corruption scenarios.

0.0.8

J.B. Metz

April 2013

Additional information regarding corruption scenarios.

0.0.9

J.B. Metz

September 2013

Small corrections.

0.0.10

J.B. Metz

July 2014

Additional information about parameter expansion.

0.0.11

J.B. Metz

October 2014

Switched to asccidoc format.

0.0.12

J.B. Metz

March 2015

Additional information regarding message files.

0.0.13

J.B. Metz

April 2019

Textual and formatting changes.

1. Overview

The Windows Event Log (EVT) format is used by Microsoft Windows to store system log information. The EVT format was deprecated in Windows Vista in favor of EVTX.

An EVT file consists of:

  • file header

  • event records

  • end of file record

  • trailing empty values

Characteristics Description

Byte order

little-endian

Date and time values

POSIX timestamp in UTC

Character strings

Unicode strings are stored in UTF-16 little-endian without the byte order mark (BOM).

1.1. Test version

The following version of programs were used to test the information within this document:

  • Windows NT 4

  • Windows 2000

  • Windows XP

  • Windows 2003

1.2. Event Log files

On Windows NT 4 the event logs files can be found in:

C:\WINNT\System32\config\

As of Windows 2000 the default location changed to:

C:\Windows\System32\config\
Filename Description

AppEvent.Evt

Application events

DFSR.Evt

Distributed File System replication events

DNSEvent.Evt

DNS Server events

EventCollector-Operational.Evt

EventForwarding-Operational.Evt

FwdEvents.Evt

Forwarded events (Event forwarding)

HrwEvents.Evt

Hardware events

Internet.Evt

Internet Explorer events

NTDS.Evt

Directory service events

NtFrs.Evt

File Replication Service events

ODiag.Evt

Microsoft Office Diagnostics events

SecEvent.Evt

Security events

SysEvent.Evt

System events

WindowsPowerShell.evt

Windows PowerShell events

2. File header

The file header (ELF_LOGFILE_HEADER or EVENTLOGHEADER) is 48 bytes of size and consists of:

Offset Size Value Description

0

4

48

Size
Including the size value

4

4

"LfLe"

Signature (ELF_LOG_SIGNATURE)

8

4

1

Major format version

12

4

1

Minor format version

16

4

First (oldest) record offset

20

4

End of file record offset

24

4

Last (newest) record number

28

4

First (oldest) record number

32

4

Maximum file size

36

4

File flags
See section: File flags

40

4

Unknown (Retention)

44

4

48

Copy of size
This value is used to indicate the end of the file header

2.1. File flags

Value Identifier Description

0x0001

ELF_LOGFILE_HEADER_DIRTY

Is dirty

0x0002

ELF_LOGFILE_HEADER_WRAP

Has wrapped

0x0004

ELF_LOGFILE_LOGFULL_WRITTEN

The last write failed because there is insufficient space

0x0008

ELF_LOGFILE_ARCHIVE_SET

Should be archived
Same purpose as equivalent in the file attributes flags

3. Event record

The event record (EVENTLOGRECORD) is variable of size and consist of:

Offset Size Value Description

0

4

Size
Including the size value

4

4

"LfLe"

Signature (ELF_LOG_SIGNATURE)

8

4

Record number

12

4

Creation date and time
Contains 32-bit Unix epoch of the date and time in UTC the record was generated

16

4

Last written date and time
Contains 32-bit Unix epoch of the date and time in UTC the record was written to file

20

4

Event identifier

24

2

Event type

26

2

Number of strings

28

2

Event category

30

2

Unknown (Event flags)
Actual usage unknown indicated as reserved

32

4

Unknown (Closing record number)
Actual usage unknown indicated as reserved

36

4

Strings offset
The offset is relative to the start of the record

40

4

User identifier (SID) size
0 if no user identifier is available

44

4

User identifier (SID) offset
The offset is relative to the start of the record
Can contain 0 but the user identifier size should also be 0

48

4

Data size
0 if no data is available

52

4

Data offset
The offset is relative to the start of the record

56

…​

Source name
Contains an UTF-16 little-endian string with end-of-string character

…​

…​

Computer name
Contains an UTF-16 little-endian string with end-of-string character

…​

…​

User SID
Contains a Windows NT security identifier
For more information see [NTSID].

…​

…​

Strings
Array of UTF-16 little-endian strings with end-of-string character

…​

…​

Data

…​

…​

Padding (empty values)
4-byte alignment

…​

4

Copy of size
This value is used to indicate the end of the event record

Note
The "strings offset" points to the offset of "copy of size" (or "data offset" if "data size" is not 0) the strings are empty. Can the "strings offset" contain 0 ?

The offsets with corresponding sizes can contain values that point outside of the record and should be ignored.

3.1. Event type

Value Identifier Description

0x0001

Event Log_ERROR_TYPE

Error event

0x0002

Event Log_WARNING_TYPE

Warning event

0x0004

Event Log_INFORMATION_TYPE

Information event

0x0008

Event Log_AUDIT_SUCCESS

Success Audit event

0x0010

Event Log_AUDIT_FAILURE

Failure Audit event

3.2. Event identifier

The event identifier is 4 bytes of size and consist of:

Offset Size Value Description

0.0

16 bits

Code

2.0

12 bits

Facility

3.4

1 bit

Reserved

3.5

1 bit

Customer flags
0 ⇒ System code
1 ⇒ Customer code

3.6

2 bits

Severity
00 ⇒ Success
01 ⇒ Informational
10 ⇒ Warning
11 ⇒ Error

3.3. Externally stored values

Some of the data that Event Viewer shows is stored outside the event log files.

The first step to determine the location of these values is find the corresponding "event log type sub key" in the Windows registry under:

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\EventLog\

Every event log type has its own sub key, e.g.:

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\EventLog\System

Common event log types are:

  • Application

  • Security

  • System

The event log type sub key has a "event source sub key" for every source name, e.g for the source name "Workstation":

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\EventLog\System\Workstation
Note
The source name is case insensitive; so "Workstation" and "workstation" are considered equivalent.

3.3.1. Event message strings

The event message strings are stored in event message files.

The event source sub key has a value named "EventMessageFile" which contains a path specification of the event message file.

%SystemRoot%\System32\netmsg.dll
Note
This value can contain multiple filenames separated by a semi colon (;) character and that the name of the event message files is case insensitive.

Here "%SystemRoot%" is case insensitive and needs to be expanded to the Windows directory. The actual value of %SystemRoot% can be found in the Registry value:

Key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\
Value: SystemRoot

This value is depended on the Windows version, e.g.

Value Version

C:\WINDOWS

Windows XP (NT 5.1) and later

C:\WINNT

Windows NT 3.1, Windows NT 4.0 and Windows 2000 (NT 5.0)

C:\WINNT35

Windows NT 3.5x

C:\WTSRV

Windows NT 4.0 Terminal Server

Other placeholders that found to be used are:

%WinDir%

The actual value of e.g. %WinDir% can be found in the Registry value:

Key: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session Manager\Environment\
Value: windir

Event message files are PE/COFF executables that contains a resource (".rsrc ") section. Event message files can have various extensions, e.g. ".exe", ".dll", ".dll.mui", ".sys".

The resource section contains a message-table resource which contains the event message strings. E.g.

C:\Windows\System32\netmsg.dll

The event message strings have identifiers similar to the event identifiers. E.g. if the event identifier is 3260 (0x00000cbc) the corresponding event message string would be:

This computer has been successfully joined to %1 '%2'.

The placeholder values %1 and %2 represent the first and second string in the event.

Note
The event message strings are language specific. An event message file can therefore contain event message strings for multiple languages.
Notes

If "EventMessageFile" points to a directory e.g. does Event Log Viewer resolves it as $directory\$event_provider_name e.g. C:\Program Files\Common Files\McAfee\SystemCore\mfeapfk.sys?

Parameter expansion

Parameter expansion is e.g. seen in event identifier 0xc0001b58 of the Service Control Manager.

String: 1                       : Application Layer Gateway-service
String: 2                       : %%1053

The event source sub key has a value named "ParameterMessageFile" which for the Service Control Manager refers to:

%SystemRoot%\System32\kernel32.dll

Here %%1053 corresponds to the message string with identifier 1053 stored in kernel32.dll, which is expanded to:

The service did not respond to the start or control request in a timely fashion.

3.3.2. Event category

The event category is primarily used in the Security event log. The category name strings are stored in event message files (also see: Event message strings).

The event source sub key has a value named "CategoryMessageFile" which contains a path specification of the event message file.

%SystemRoot%\System32\MsAuditE.dll

The event category number corresponds to the event message strings in the event message file. The corresponding event message string should not contain a placeholder.

If there is no corresponding "CategoryMessageFile" the event category number should always be 0?

The value "CategoryCount" in the event source sub key contain the number of categories defined for the specific event source.

4. End of file record

The end of file record (ELF_EOF_RECORD or EVENTLOGEOF) is 40 bytes of size and consists of:

Offset Size Value Description

0

4

0x28

Size
Including the size value

4

4

0x11111111

Signature1

8

4

0x22222222

Signature2

12

4

0x33333333

Signature3

16

4

0x44444444

Signature4

20

4

First (oldest) record offset

24

4

End of file record offset

28

4

Last (newest) record number

32

4

First (oldest) record number

36

4

0x28

Copy of size
This value is used to indicate the end of the file header

5. Corruption scenarios

5.1. Dirty file with invalid offset values

In the dirty file with invalid offset values scenarios the file header indicates it is dirty and the first record offset and end of file record offset point to invalid locations in the file. The most likely cause for this scenario is that the file was in use but the header was not updated.

The approach is to find the event records is to start looking for the end-of-file record after the the end-of-file record offset.

5.1.1. Trailing non-event data

In the dirty file with invalid offset values scenarios it sometimes can happen that the file is wrapped and that there is trailing data after the last event before the wrap.

The approach is to continue finding the event records is to ignore this trailing data.

5.2. Truncated event record

The data of the event record is not complete, part of the event record data is filled with 0-byte values. The copy of the record size is 0.

5.2.1. Truncated strings data

If the the truncation occurs in the strings data part of the record can still be read.

The approach is to ignore the truncated part of the strings data.

5.3. Event record with data offset is beyond record size

Although the data offset does not seem to be 0, the value can be beyond the record size. As long as the data size is 0 the data offset can be safely ignored.

If the data is not 0, does this indicate the record has actual data and how to detect it?

Appendix A: References

Appendix B: GNU Free Documentation License

Version 1.3, 3 November 2008 Copyright © 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc. http://fsf.org/

Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.

0. PREAMBLE

The purpose of this License is to make a manual, textbook, or other functional and useful document "free" in the sense of freedom: to assure everyone the effective freedom to copy and redistribute it, with or without modifying it, either commercially or noncommercially. Secondarily, this License preserves for the author and publisher a way to get credit for their work, while not being considered responsible for modifications made by others.

This License is a kind of "copyleft", which means that derivative works of the document must themselves be free in the same sense. It complements the GNU General Public License, which is a copyleft license designed for free software.

We have designed this License in order to use it for manuals for free software, because free software needs free documentation: a free program should come with manuals providing the same freedoms that the software does. But this License is not limited to software manuals; it can be used for any textual work, regardless of subject matter or whether it is published as a printed book. We recommend this License principally for works whose purpose is instruction or reference.

1. APPLICABILITY AND DEFINITIONS

This License applies to any manual or other work, in any medium, that contains a notice placed by the copyright holder saying it can be distributed under the terms of this License. Such a notice grants a world-wide, royalty-free license, unlimited in duration, to use that work under the conditions stated herein. The "Document", below, refers to any such manual or work. Any member of the public is a licensee, and is addressed as "you". You accept the license if you copy, modify or distribute the work in a way requiring permission under copyright law.

A "Modified Version" of the Document means any work containing the Document or a portion of it, either copied verbatim, or with modifications and/or translated into another language.

A "Secondary Section" is a named appendix or a front-matter section of the Document that deals exclusively with the relationship of the publishers or authors of the Document to the Document’s overall subject (or to related matters) and contains nothing that could fall directly within that overall subject. (Thus, if the Document is in part a textbook of mathematics, a Secondary Section may not explain any mathematics.) The relationship could be a matter of historical connection with the subject or with related matters, or of legal, commercial, philosophical, ethical or political position regarding them.

The "Invariant Sections" are certain Secondary Sections whose titles are designated, as being those of Invariant Sections, in the notice that says that the Document is released under this License. If a section does not fit the above definition of Secondary then it is not allowed to be designated as Invariant. The Document may contain zero Invariant Sections. If the Document does not identify any Invariant Sections then there are none.

The "Cover Texts" are certain short passages of text that are listed, as Front-Cover Texts or Back-Cover Texts, in the notice that says that the Document is released under this License. A Front-Cover Text may be at most 5 words, and a Back-Cover Text may be at most 25 words.

A "Transparent" copy of the Document means a machine-readable copy, represented in a format whose specification is available to the general public, that is suitable for revising the document straightforwardly with generic text editors or (for images composed of pixels) generic paint programs or (for drawings) some widely available drawing editor, and that is suitable for input to text formatters or for automatic translation to a variety of formats suitable for input to text formatters. A copy made in an otherwise Transparent file format whose markup, or absence of markup, has been arranged to thwart or discourage subsequent modification by readers is not Transparent. An image format is not Transparent if used for any substantial amount of text. A copy that is not "Transparent" is called "Opaque".

Examples of suitable formats for Transparent copies include plain ASCII without markup, Texinfo input format, LaTeX input format, SGML or XML using a publicly available DTD, and standard-conforming simple HTML, PostScript or PDF designed for human modification. Examples of transparent image formats include PNG, XCF and JPG. Opaque formats include proprietary formats that can be read and edited only by proprietary word processors, SGML or XML for which the DTD and/or processing tools are not generally available, and the machine-generated HTML, PostScript or PDF produced by some word processors for output purposes only.

The "Title Page" means, for a printed book, the title page itself, plus such following pages as are needed to hold, legibly, the material this License requires to appear in the title page. For works in formats which do not have any title page as such, "Title Page" means the text near the most prominent appearance of the work’s title, preceding the beginning of the body of the text.

The "publisher" means any person or entity that distributes copies of the Document to the public.

A section "Entitled XYZ" means a named subunit of the Document whose title either is precisely XYZ or contains XYZ in parentheses following text that translates XYZ in another language. (Here XYZ stands for a specific section name mentioned below, such as "Acknowledgements", "Dedications", "Endorsements", or "History".) To "Preserve the Title" of such a section when you modify the Document means that it remains a section "Entitled XYZ" according to this definition.

The Document may include Warranty Disclaimers next to the notice which states that this License applies to the Document. These Warranty Disclaimers are considered to be included by reference in this License, but only as regards disclaiming warranties: any other implication that these Warranty Disclaimers may have is void and has no effect on the meaning of this License.

2. VERBATIM COPYING

You may copy and distribute the Document in any medium, either commercially or noncommercially, provided that this License, the copyright notices, and the license notice saying this License applies to the Document are reproduced in all copies, and that you add no other conditions whatsoever to those of this License. You may not use technical measures to obstruct or control the reading or further copying of the copies you make or distribute. However, you may accept compensation in exchange for copies. If you distribute a large enough number of copies you must also follow the conditions in section 3.

You may also lend copies, under the same conditions stated above, and you may publicly display copies.

3. COPYING IN QUANTITY

If you publish printed copies (or copies in media that commonly have printed covers) of the Document, numbering more than 100, and the Document’s license notice requires Cover Texts, you must enclose the copies in covers that carry, clearly and legibly, all these Cover Texts: Front-Cover Texts on the front cover, and Back-Cover Texts on the back cover. Both covers must also clearly and legibly identify you as the publisher of these copies. The front cover must present the full title with all words of the title equally prominent and visible. You may add other material on the covers in addition. Copying with changes limited to the covers, as long as they preserve the title of the Document and satisfy these conditions, can be treated as verbatim copying in other respects.

If the required texts for either cover are too voluminous to fit legibly, you should put the first ones listed (as many as fit reasonably) on the actual cover, and continue the rest onto adjacent pages.

If you publish or distribute Opaque copies of the Document numbering more than 100, you must either include a machine-readable Transparent copy along with each Opaque copy, or state in or with each Opaque copy a computer-network location from which the general network-using public has access to download using public-standard network protocols a complete Transparent copy of the Document, free of added material. If you use the latter option, you must take reasonably prudent steps, when you begin distribution of Opaque copies in quantity, to ensure that this Transparent copy will remain thus accessible at the stated location until at least one year after the last time you distribute an Opaque copy (directly or through your agents or retailers) of that edition to the public.

It is requested, but not required, that you contact the authors of the Document well before redistributing any large number of copies, to give them a chance to provide you with an updated version of the Document.

4. MODIFICATIONS

You may copy and distribute a Modified Version of the Document under the conditions of sections 2 and 3 above, provided that you release the Modified Version under precisely this License, with the Modified Version filling the role of the Document, thus licensing distribution and modification of the Modified Version to whoever possesses a copy of it. In addition, you must do these things in the Modified Version:

  1. Use in the Title Page (and on the covers, if any) a title distinct from that of the Document, and from those of previous versions (which should, if there were any, be listed in the History section of the Document). You may use the same title as a previous version if the original publisher of that version gives permission.

  2. List on the Title Page, as authors, one or more persons or entities responsible for authorship of the modifications in the Modified Version, together with at least five of the principal authors of the Document (all of its principal authors, if it has fewer than five), unless they release you from this requirement.

  3. State on the Title page the name of the publisher of the Modified Version, as the publisher.

  4. Preserve all the copyright notices of the Document.

  5. Add an appropriate copyright notice for your modifications adjacent to the other copyright notices.

  6. Include, immediately after the copyright notices, a license notice giving the public permission to use the Modified Version under the terms of this License, in the form shown in the Addendum below.

  7. Preserve in that license notice the full lists of Invariant Sections and required Cover Texts given in the Document’s license notice.

  8. Include an unaltered copy of this License.

  9. Preserve the section Entitled "History", Preserve its Title, and add to it an item stating at least the title, year, new authors, and publisher of the Modified Version as given on the Title Page. If there is no section Entitled "History" in the Document, create one stating the title, year, authors, and publisher of the Document as given on its Title Page, then add an item describing the Modified Version as stated in the previous sentence.

  10. Preserve the network location, if any, given in the Document for public access to a Transparent copy of the Document, and likewise the network locations given in the Document for previous versions it was based on. These may be placed in the "History" section. You may omit a network location for a work that was published at least four years before the Document itself, or if the original publisher of the version it refers to gives permission.

  11. For any section Entitled "Acknowledgements" or "Dedications", Preserve the Title of the section, and preserve in the section all the substance and tone of each of the contributor acknowledgements and/or dedications given therein.

  12. Preserve all the Invariant Sections of the Document, unaltered in their text and in their titles. Section numbers or the equivalent are not considered part of the section titles.

  13. Delete any section Entitled "Endorsements". Such a section may not be included in the Modified Version.

  14. Do not retitle any existing section to be Entitled "Endorsements" or to conflict in title with any Invariant Section.

  15. Preserve any Warranty Disclaimers.

If the Modified Version includes new front-matter sections or appendices that qualify as Secondary Sections and contain no material copied from the Document, you may at your option designate some or all of these sections as invariant. To do this, add their titles to the list of Invariant Sections in the Modified Version’s license notice. These titles must be distinct from any other section titles.

You may add a section Entitled "Endorsements", provided it contains nothing but endorsements of your Modified Version by various parties—for example, statements of peer review or that the text has been approved by an organization as the authoritative definition of a standard.

You may add a passage of up to five words as a Front-Cover Text, and a passage of up to 25 words as a Back-Cover Text, to the end of the list of Cover Texts in the Modified Version. Only one passage of Front-Cover Text and one of Back-Cover Text may be added by (or through arrangements made by) any one entity. If the Document already includes a cover text for the same cover, previously added by you or by arrangement made by the same entity you are acting on behalf of, you may not add another; but you may replace the old one, on explicit permission from the previous publisher that added the old one.

The author(s) and publisher(s) of the Document do not by this License give permission to use their names for publicity for or to assert or imply endorsement of any Modified Version.

5. COMBINING DOCUMENTS

You may combine the Document with other documents released under this License, under the terms defined in section 4 above for modified versions, provided that you include in the combination all of the Invariant Sections of all of the original documents, unmodified, and list them all as Invariant Sections of your combined work in its license notice, and that you preserve all their Warranty Disclaimers.

The combined work need only contain one copy of this License, and multiple identical Invariant Sections may be replaced with a single copy. If there are multiple Invariant Sections with the same name but different contents, make the title of each such section unique by adding at the end of it, in parentheses, the name of the original author or publisher of that section if known, or else a unique number. Make the same adjustment to the section titles in the list of Invariant Sections in the license notice of the combined work.

In the combination, you must combine any sections Entitled "History" in the various original documents, forming one section Entitled "History"; likewise combine any sections Entitled "Acknowledgements", and any sections Entitled "Dedications". You must delete all sections Entitled "Endorsements".

6. COLLECTIONS OF DOCUMENTS

You may make a collection consisting of the Document and other documents released under this License, and replace the individual copies of this License in the various documents with a single copy that is included in the collection, provided that you follow the rules of this License for verbatim copying of each of the documents in all other respects.

You may extract a single document from such a collection, and distribute it individually under this License, provided you insert a copy of this License into the extracted document, and follow this License in all other respects regarding verbatim copying of that document.

7. AGGREGATION WITH INDEPENDENT WORKS

A compilation of the Document or its derivatives with other separate and independent documents or works, in or on a volume of a storage or distribution medium, is called an "aggregate" if the copyright resulting from the compilation is not used to limit the legal rights of the compilation’s users beyond what the individual works permit. When the Document is included in an aggregate, this License does not apply to the other works in the aggregate which are not themselves derivative works of the Document.

If the Cover Text requirement of section 3 is applicable to these copies of the Document, then if the Document is less than one half of the entire aggregate, the Document’s Cover Texts may be placed on covers that bracket the Document within the aggregate, or the electronic equivalent of covers if the Document is in electronic form. Otherwise they must appear on printed covers that bracket the whole aggregate.

8. TRANSLATION

Translation is considered a kind of modification, so you may distribute translations of the Document under the terms of section 4. Replacing Invariant Sections with translations requires special permission from their copyright holders, but you may include translations of some or all Invariant Sections in addition to the original versions of these Invariant Sections. You may include a translation of this License, and all the license notices in the Document, and any Warranty Disclaimers, provided that you also include the original English version of this License and the original versions of those notices and disclaimers. In case of a disagreement between the translation and the original version of this License or a notice or disclaimer, the original version will prevail.

If a section in the Document is Entitled "Acknowledgements", "Dedications", or "History", the requirement (section 4) to Preserve its Title (section 1) will typically require changing the actual title.

9. TERMINATION

You may not copy, modify, sublicense, or distribute the Document except as expressly provided under this License. Any attempt otherwise to copy, modify, sublicense, or distribute it is void, and will automatically terminate your rights under this License.

However, if you cease all violation of this License, then your license from a particular copyright holder is reinstated (a) provisionally, unless and until the copyright holder explicitly and finally terminates your license, and (b) permanently, if the copyright holder fails to notify you of the violation by some reasonable means prior to 60 days after the cessation.

Moreover, your license from a particular copyright holder is reinstated permanently if the copyright holder notifies you of the violation by some reasonable means, this is the first time you have received notice of violation of this License (for any work) from that copyright holder, and you cure the violation prior to 30 days after your receipt of the notice.

Termination of your rights under this section does not terminate the licenses of parties who have received copies or rights from you under this License. If your rights have been terminated and not permanently reinstated, receipt of a copy of some or all of the same material does not give you any rights to use it.

10. FUTURE REVISIONS OF THIS LICENSE

The Free Software Foundation may publish new, revised versions of the GNU Free Documentation 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. See http://www.gnu.org/copyleft/.

Each version of the License is given a distinguishing version number. If the Document specifies that a particular numbered version of this License "or any later version" applies to it, you have the option of following the terms and conditions either of that specified version or of any later version that has been published (not as a draft) by the Free Software Foundation. If the Document does not specify a version number of this License, you may choose any version ever published (not as a draft) by the Free Software Foundation. If the Document specifies that a proxy can decide which future versions of this License can be used, that proxy’s public statement of acceptance of a version permanently authorizes you to choose that version for the Document.

11. RELICENSING

"Massive Multiauthor Collaboration Site" (or "MMC Site") means any World Wide Web server that publishes copyrightable works and also provides prominent facilities for anybody to edit those works. A public wiki that anybody can edit is an example of such a server. A "Massive Multiauthor Collaboration" (or "MMC") contained in the site means any set of copyrightable works thus published on the MMC site.

"CC-BY-SA" means the Creative Commons Attribution-Share Alike 3.0 license published by Creative Commons Corporation, a not-for-profit corporation with a principal place of business in San Francisco, California, as well as future copyleft versions of that license published by that same organization.

"Incorporate" means to publish or republish a Document, in whole or in part, as part of another Document.

An MMC is "eligible for relicensing" if it is licensed under this License, and if all works that were first published under this License somewhere other than this MMC, and subsequently incorporated in whole or in part into the MMC, (1) had no cover texts or invariant sections, and (2) were thus incorporated prior to November 1, 2008.

The operator of an MMC Site may republish an MMC contained in the site under CC-BY-SA on the same site at any time before August 1, 2009, provided the MMC is eligible for relicensing.

You can’t perform that action at this time.