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Add the article for other languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-0" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">Add languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> <div class="after-portlet after-portlet-lang"><span class="uls-after-portlet-link"></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Namespaces"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-module" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Module:Check_isxn" title="View the module page [c]" accesskey="c"><span>Module</span></a></li><li id="ca-talk" class="new vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Module_talk:Check_isxn&action=edit&redlink=1" rel="discussion" class="new" title="Discussion about the content page (not yet started) [t]" accesskey="t"><span>Talk</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Change language variant" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">English</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="Views"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="vector-tab-noicon mw-list-item"><a href="/wiki/Module:Check_isxn"><span>Read</span></a></li><li id="ca-edit" class="selected vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Module:Check_isxn&action=edit" title="Edit the source code of this page"><span>Change source</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Module:Check_isxn&action=history" title="Past revisions of this page [h]" accesskey="h"><span>View history</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="Tools" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Tools</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" 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This block began on 15:12, 27 August 2023 and has been set to finish on: <b>15:12, 27 August 2028</b>.</td></tr> </tbody></table> <div style="text-align: center;"><big> </big><p><big><b>You are not blocked from reading pages, only from changing or creating them.</b></big><br /> If you have just clicked a <span style="color:#BA0000; text-decoration:underline;">red link</span>, you were blocked from creating a new page as no article on that topic is there yet. </p> </div> If you think you were not blocked fairly, you may make unblock requests or file appeals at <a href="https://meta.wikimedia.org/wiki/Steward_requests/Global" class="extiw" title="meta:Steward requests/Global">meta:Steward requests/Global</a>.</div></div><hr /> <p>You can view and copy the source of this page. </p><textarea readonly="" accesskey="," id="wpTextbox1" cols="80" rows="25" style="" class="mw-editfont-monospace" lang="en" dir="ltr" name="wpTextbox1">-- This template is a copy of the ISXN validation code from [[Module:Citation/CS1]] -- which allows for validating ISBN, ISMN, and ISSN without invoking a citation template local p = {} --[[--------------------------< IS _ V A L I D _ I S X N >----------------------------------------------------- ISBN-10 and ISSN validator code calculates checksum across all isbn/issn digits including the check digit. ISBN-13 is checked in check_isbn(). If the number is valid the result will be 0. Before calling this function, issbn/issn must be checked for length and stripped of dashes, spaces and other non-isxn characters. ]] local function is_valid_isxn (isxn_str, len) local temp = 0; isxn_str = { isxn_str:byte(1, len) }; -- make a table of byte values '0' → 0x30 .. '9' → 0x39, 'X' → 0x58 len = len+1; -- adjust to be a loop counter for i, v in ipairs( isxn_str ) do -- loop through all of the bytes and calculate the checksum if v == string.byte( "X" ) then -- if checkdigit is X (compares the byte value of 'X' which is 0x58) temp = temp + 10*( len - i ); -- it represents 10 decimal else temp = temp + tonumber( string.char(v) )*(len-i); end end return temp % 11 == 0; -- returns true if calculation result is zero end --[[--------------------------< IS _ V A L I D _ I S X N _ 1 3 >---------------------------------------------- ISBN-13 and ISMN validator code calculates checksum across all 13 isbn/ismn digits including the check digit. If the number is valid, the result will be 0. Before calling this function, isbn-13/ismn must be checked for length and stripped of dashes, spaces and other non-isxn-13 characters. ]] local function is_valid_isxn_13 (isxn_str) local temp=0; isxn_str = { isxn_str:byte(1, 13) }; -- make a table of byte values '0' → 0x30 .. '9' → 0x39 for i, v in ipairs( isxn_str ) do temp = temp + (3 - 2*(i % 2)) * tonumber( string.char(v) ); -- multiply odd index digits by 1, even index digits by 3 and sum; includes check digit end return temp % 10 == 0; -- sum modulo 10 is zero when isbn-13/ismn is correct end --[[--------------------------< C H E C K _ I S B N >------------------------------------------------------------ Determines whether an ISBN string is valid ]] local function check_isbn( isbn_str, error_string ) if nil ~= isbn_str:match("[^%s-0-9X]") then -- fail if isbn_str contains anything but digits, hyphens, or the uppercase X return error_string; end isbn_str = isbn_str:gsub( "-", "" ):gsub( " ", "" ); -- remove hyphens and spaces local len = isbn_str:len(); if len ~= 10 and len ~= 13 then return error_string; end if len == 10 then if isbn_str:match( "^%d*X?$" ) == nil then return error_string; end return is_valid_isxn(isbn_str, 10) and '' or error_string; else local temp = 0; if isbn_str:match( "^97[89]%d*$" ) == nil then -- isbn13 begins with 978 or 979; ismn begins with 979 return error_string; end return is_valid_isxn_13 (isbn_str) and '' or error_string; end end --[[--------------------------< C H E C K _ I S M N >------------------------------------------------------------ Determines whether an ISMN string is valid. Similar to isbn-13, ismn is 13 digits begining 979-0-... and uses the same check digit calculations. See http://www.ismn-international.org/download/Web_ISMN_Users_Manual_2008-6.pdf section 2, pages 9–12. ]] local function check_ismn (id, error_string) local text; local valid_ismn = true; id=id:gsub( "[%s-–]", "" ); -- strip spaces, hyphens, and endashes from the ismn if 13 ~= id:len() or id:match( "^9790%d*$" ) == nil then -- ismn must be 13 digits and begin 9790 valid_ismn = false; else valid_ismn=is_valid_isxn_13 (id); -- validate ismn end return valid_ismn and '' or error_string end --[[--------------------------< I S S N >---------------------------------------------------------------------- Validate and format an issn. This code fixes the case where an editor has included an ISSN in the citation but has separated the two groups of four digits with a space. When that condition occurred, the resulting link looked like this: |issn=0819 4327 gives: [http://www.worldcat.org/issn/0819 4327 0819 4327] -- can't have spaces in an external link This code now prevents that by inserting a hyphen at the issn midpoint. It also validates the issn for length and makes sure that the checkdigit agrees with the calculated value. Incorrect length (8 digits), characters other than 0-9 and X, or checkdigit / calculated value mismatch will all cause a check issn error message. ]] local function check_issn(id, error_string) local issn_copy = id; -- save a copy of unadulterated issn; use this version for display if issn does not validate local text; local valid_issn = true; if not id:match ('^%d%d%d%d%-%d%d%d[%dX]$') then return error_string; end id=id:gsub( "[%s-–]", "" ); -- strip spaces, hyphens, and endashes from the issn if 8 ~= id:len() or nil == id:match( "^%d*X?$" ) then -- validate the issn: 8 digits long, containing only 0-9 or X in the last position valid_issn=false; -- wrong length or improper character else valid_issn=is_valid_isxn(id, 8); -- validate issn end return valid_issn and '' or error_string end ------------------------------< E N T R Y P O I N T S >--------------------------------------------------==== function p.check_isbn(frame) return check_isbn(frame.args[1] or frame:getParent().args[1], frame.args['error'] or frame:getParent().args['error'] or 'error') end function p.check_ismn(frame) return check_ismn(frame.args[1] or frame:getParent().args[1], frame.args['error'] or frame:getParent().args['error'] or 'error') end function p.check_issn(frame) return check_issn(frame.args[1] or frame:getParent().args[1], frame.args['error'] or frame:getParent().args['error'] or 'error') end return p </textarea><div id="mw-scribunto-console"></div><div class="templatesUsed"><div class="mw-templatesUsedExplanation"><p>Template used on this page: </p></div><ul> <li><a href="/w/index.php?title=Module:Check_isxn/doc&action=edit&redlink=1" class="new" title="Module:Check isxn/doc (not yet started)">Module:Check isxn/doc</a> (<a href="/w/index.php?title=Module:Check_isxn/doc&action=edit" class="new" title="Module:Check isxn/doc (not yet started)">change</a>) </li></ul></div><p id="mw-returnto">Return to <a href="/wiki/Module:Check_isxn" title="Module:Check isxn">Module:Check isxn</a></p> <noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1&useformat=desktop" alt="" width="1" height="1" style="border: none; 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