Wikipedia pages can be exported and saved as PDF files. contributors, and licenses" listing all of the contributors, "Images" listing all of the images used in the. Store Wikipedia or Project Gutenberg on your mobile phone easily with our free and open source software. The official Wikipedia Android app is designed to help you find, discover, and explore knowledge on Wikipedia. Settle a bet with a friend by doing a quick search.
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Wikipedia offers free copies of all available content to interested users. MzReader (for Windows); Selected Wikipedia articles as a PDF, OpenDocument, etc. This is a list of links to articles on software used to manage Portable Document Format (PDF) .. PDF to SWF – command line with GUI wrapper; poppler-utils a collection of tools builds on poppler to convert PDF contents to everything. The Portable Document Format (PDF) is a file format developed by Adobe in the s to . Normally all image content in a PDF is embedded in the file. But PDF .
WikiFilter is a program which allows you to browse over dump files without visiting a Wiki site. Free Software Foundation. Wales considers himself to be the sole founder of Wikipedia and has told the Boston Globe that "it's preposterous" to call Sanger the co-founder. No images. In Lih wrote, "No doubt, American spellings tend to dominate by default just because of sheer numbers. AcroForms can keep form field values in external stand-alone files containing key: The Dilbert comic strip from May 8, , features a character supporting an improbable claim by saying "Give me ten minutes and then check Wikipedia.
San Diego Union Tribune. Archived from the original on 14 January Retrieved 15 October Meyers, Peter 20 September This Site Wants You". New York Times. Sanger, Larry. Retrieved 12 April See m: List of Wikipedias.
Retrieved 21 September Five million articles". Wikimedia Foundation. Retrieved 1 November How Wikipedia Works: And how You Can be a Part of it. No Starch Press. Retrieved 30 January Retrieved 8 August The Age.
Fairfax Digital Network. Retrieved 15 June Retrieved 9 June Emory Law Journal. Great Teams". Time Warner. Retrieved 14 June Retrieved 1 April Los Angeles Times. Retrieved 19 January Bloomington, IL: Associated Press. Retrieved 26 January The 10 most controversial Wikipedia pages. Retrieved on 26 July Archived from the original on 12 April Retrieved 26 July CS1 maint: Archived copy as title link CS1 maint: Manual of Style spelling ". Retrieved 25 February Manual of Style".
Retrieved 10 October Retrieved 16 March Version 1. Retrieved 28 October First Monday. Retrieved 13 July McKeon 22 July Retrieved 30 October Retrieved 29 January Wikimedia Statistics. Retrieved 28 July The New York Times.
Retrieved 29 February Les Inrockuptibles. The Atlantic. Retrieved 21 February Common Knowledge?: An Ethnography of Wikipedia. Stanford University Press. A systematic review of scholarly research on Wikipedia".
Harvard Law School. Practicing Strategy: Text and Cases. SAGE Publications. The Everything Guide to Social Media. Get multistream. The first field of this index is of bytes to seek into the compressed archive, the second is the article ID, the third the article title.
If you are a developer you should pay attention because this doesn't seem to be documented anywhere else here and this information was effectively reverse engineered.
In the dumps. The sub-directories are named for the language code and the appropriate project. Some other directories e. These dumps are also available from the Internet Archive. Images and other uploaded media are available from mirrors in addition to being served directly from Wikimedia servers. Bulk download is as of September available from mirrors but not offered directly from Wikimedia servers.
See the list of current mirrors. You should rsync from the mirror, then fill in the missing images from upload. In any case, make sure you have an accurate user agent string with contact info email address so ops can contact you if there's an issue. You should be getting checksums from the mediawiki API and verifying them.
The API Etiquette page contains some guidelines, although not all of them apply for example, because upload. They may be under one of many free licenses , in the public domain , believed to be fair use , or even copyright infringements which should be deleted. In particular, use of fair use images outside the context of Wikipedia or similar works may be illegal. Images under most licenses require a credit, and possibly other attached copyright information.
This information is included in image description pages, which are part of the text dumps available from dumps. In conclusion, download these images at your own risk Legal. Compressed dump files are significantly compressed, thus after being decompressed will take up large amounts of drive space.
A large list of decompression programs are described in Comparison of file archivers. The following programs in particular can be used to decompress bzip2. Beginning with Windows XP , a basic decompression program enables decompression of zip files. As files grow in size, so does the likelihood they will exceed some limit of a computing device. Each operating system, file system, hard storage device, and software application has a maximum file size limit.
Each one of these will likely have a different maximum, and the lowest limit of all of them will become the file size limit for a storage device.
The older the software in a computing device, the more likely it will have a 2 GB file limit somewhere in the system. Before starting a download of a large file, check the storage device to ensure its file system can support files of such a large size, and check the amount of free space to ensure that it can hold the downloaded file. There are two limits for a file system: In general, since the file size limit is less than the file system limit, the larger file system limits are a moot point.
A large percentage of users assume they can create files up to the size of their storage device, but are wrong in their assumption. The following is a list of the most common file systems, and see Comparison of file systems for additional detailed information. Each operating system has internal file system limits for file size and drive size, which is independent of the file system or physical media.
If the operating system has any limits lower than the file system or physical media, then the OS limits will be the real limit. It is useful to check the MD5 sums provided in a file in the download directory to make sure the download was complete and accurate.
This can be checked by running the "md5sum" command on the files downloaded. Given their sizes, this may take some time to calculate. Due to the technical details of how files are stored, file sizes may be reported differently on different filesystems, and so are not necessarily reliable. Also, corruption may have occurred during the download, though this is unlikely.
If you plan to download Wikipedia Dump files to one computer and use an external USB flash drive or hard drive to copy them to other computers, then you will run into the 4 GB FAT32 file size limit. If you seem to be hitting the 2 GB limit, try using wget version 1.
The characters are specified using the encoding of a selected font resource. A font object in PDF is a description of a digital typeface. It may either describe the characteristics of a typeface, or it may include an embedded font file. The latter case is called an embedded font while the former is called an unembedded font. The font files that may be embedded are based on widely used standard digital font formats: Fourteen typefaces, known as the standard 14 fonts , have a special significance in PDF documents:.
These fonts are sometimes called the base fourteen fonts. Within text strings, characters are shown using character codes integers that map to glyphs in the current font using an encoding. There are a number of predefined encodings, including WinAnsi , MacRoman , and a large number of encodings for East Asian languages, and a font can have its own built-in encoding. Although the WinAnsi and MacRoman encodings are derived from the historical properties of the Windows and Macintosh operating systems, fonts using these encodings work equally well on any platform.
PDF can specify a predefined encoding to use, the font's built-in encoding or provide a lookup table of differences to a predefined or built-in encoding not recommended with TrueType fonts.
For large fonts or fonts with non-standard glyphs, the special encodings Identity-H for horizontal writing and Identity-V for vertical are used. With such fonts it is necessary to provide a ToUnicode table if semantic information about the characters is to be preserved.
In PDF 1. When transparency is used, new objects interact with previously marked objects to produce blending effects. The addition of transparency to PDF was done by means of new extensions that were designed to be ignored in products written to the PDF 1. As a result, files that use a small amount of transparency might view acceptably in older viewers, but files making extensive use of transparency could be viewed incorrectly in an older viewer without warning.
The transparency extensions are based on the key concepts of transparency groups , blending modes , shape , and alpha. The model is closely aligned with the features of Adobe Illustrator version 9. The blend modes were based on those used by Adobe Photoshop at the time. When the PDF 1. They have since been published. The concept of a transparency group in PDF specification is independent of existing notions of "group" or "layer" in applications such as Adobe Illustrator.
Those groupings reflect logical relationships among objects that are meaningful when editing those objects, but they are not part of the imaging model. PDF files may contain interactive elements such as annotations, form fields, video, 3D and rich media. Both formats today coexist in PDF specification: AcroForms were introduced in the PDF 1. AcroForms permit using objects e. Alongside the standard PDF action types, interactive forms AcroForms support submitting, resetting, and importing data.
The "submit" action transmits the names and values of selected interactive form fields to a specified uniform resource locator URL. AcroForms can keep form field values in external stand-alone files containing key: The Forms Data Format can be used when submitting form data to a server, receiving the response, and incorporating into the interactive form.
It can also be used to export form data to stand-alone files that can be imported back into the corresponding PDF interactive form.
In addition, XFDF does not allow the spawning, or addition, of new pages based on the given data; as can be done when using an FDF file. A "tagged" PDF see clause Technically speaking, tagged PDF is a stylized use of the format that builds on the logical structure framework introduced in PDF 1. Tagged PDF defines a set of standard structure types and attributes that allow page content text, graphics, and images to be extracted and reused for other purposes.
With the introduction of PDF version, 1. Layers, or as they are more formally known Optional Content Groups OCGs , refer to sections of content in a PDF document that can be selectively viewed or hidden by document authors or consumers. This capability is useful in CAD drawings, layered artwork, maps, multi-language documents etc. Basically, it consists of an Optional Content Properties Dictionary added to the document root. This dictionary contains an array of Optional Content Groups OCGs , each describing a set of information and each of which may be individually displayed or suppressed, plus a set of Optional Content Configuration Dictionaries, which give the status Displayed or Suppressed of the given OCGs.
A PDF file may be encrypted for security, or digitally signed for authentication. The standard security provided by Acrobat PDF consists of two different methods and two different passwords: The user password encrypts the file, while the owner password does not, instead relying on client software to respect these restrictions.
An owner password can easily be removed by software, including some free online services. Even without removing the password, most freeware or open source PDF readers ignore the permission "protections" and allow the user to print or make copy of excerpts of the text as if the document were not limited by password protection.
There are a number of commercial solutions that offer more robust means of information rights management.
Not only can they restrict document access but they also reliably enforce permissions in ways that the standard security handler does not. The signature is used to validate that the permissions have been granted by a bona fide granting authority. For example, it can be used to allow a user: For example, Adobe Systems grants permissions to enable additional features in Adobe Reader, using public-key cryptography.
Adobe Reader verifies that the signature uses a certificate from an Adobe-authorized certificate authority. Any PDF application can use this same mechanism for its own purposes.
PDF files can have file attachments which processors may access and open or save to a local filesystem. PDF files can contain two types of metadata. This is stored in the optional Info trailer of the file.
A small set of fields is defined, and can be extended with additional text values if required. This method is deprecated in PDF 2. This allows metadata to be attached to any stream in the document, such as information about embedded illustrations, as well as the whole document attaching to the document catalog , using an extensible schema.
PDFs may be encrypted so that a password is needed to view or edit the contents. PDF 2. PDF files may also contain embedded DRM restrictions that provide further controls that limit copying, editing or printing. These restrictions depend on the reader software to obey them, so the security they provide is limited.
PDF documents can contain display settings, including the page display layout and zoom level. Adobe Reader uses these settings to override the user's default settings when opening the document.