This page is intended to describe features of PmWiki 1.0 that have been changed or eliminated in PmWiki 2.0.  For now this page will be maintained as a simple list and will probably need some restructuring later.
Markup changes
- Double brackets are used for all links, including 
[[free links]].  Providing alternate text for a link is performed using either a vertical brace  [[PageName | link text]] or an arrow [[link text -> PageName]].  See PmWiki.Links.
 - So far, the 
ThisPage:, ThisGroup:, etc., InterMap shortcuts are not defined.  In fact, they may not be needed in PmWiki 2.  If someone needs them, add an entry to PITS:NewIssue explaining why.
Ok, so as an example, how next lines, which are in a sidebar, may be written in pmwiki2 ?
*[[ThisPage:?action=upload Upload]]
*[[ThisGroup:SideBar&action=edit Edit menu]]
 
 You can write them as [[{$Name}?action=upload | Upload]] and [[{$Group}/SideBar?action=edit | Edit menu]].  
 Changes affecting skins
- $PageTemplateFmt is obsolete, but $PageTemplateFmt still works, and this may change yet again before the 2.0 official release. To use a different skin, you can use the 
$Skin variable ($Skin = 'skinname';) and just fill it with the name of the skin, it will assume it's in the pub/skins/[skinname] folder containing the [skinname].tmpl file.
 - $HTMLTitleFmt no longer exists -- just place the <title> information directly into the template.
 - In $...Fmt strings, $Title_ and $Title are currently represented by $Name.  $Title is now used to refer to a page's title (which may be different from its name and could have different formatting, such as spaces).
 - The css/stdlayout.css file no longer exists; PmWiki and other modules now place required formatting styles directly into the 
$HTMLStylesFmt array.
 - $PageName is now $FullName.  $PageName still functions but will be removed in the 2.0 official release.
 - Searching now uses the 
q= variable to provide the text to be searched (formerly the search text went in the text= variable.
 
Other Customization Changes
- PmWiki 2 now uses session-based authentication by default.  If you want to continue to use HTTP-Basic authentication, add the following line to config.php:
 
        include_once('scripts/httpauth.php');
- Disabling WikiWords is now done by setting 
$LinkWikiWords .  Previously this was controlled by $WikiWordCountMax .
 - $HTMLLineBreak is now 
$HTMLPNewline.  See Cookbook:Line Breaks.
 - The skins system has been revised, and is now much more flexibly controlled by the 
$Skin and $ActionSkins variables.  See PmWiki.Skins.  But $PageTemplateFmt still works.
 - The $BrowseReplacements, $DoubleBrackets, and $InlineReplacements arrays are no longer used -- see custom markup.
 ?action=post no longer exists -- posting a new page is now performed by using ?action=edit with the post control set to a true value.
- $WikiWordPagePathFmt is now 
$PagePathFmt, which is applied to all page links not qualified by a group.
 - $WikiPageExistsFmt, $WikiPageCreateFmt, etc. are now 
$LinkPageExistsFmt, $LinkPageCreateFmt, etc.
 - $DeleteKeyWord is now 
$DeleteKeyPattern.
 $GroupHeaderFmt and $GroupFooterFmt now specify the markup to be added to the beginning and end of each page, rather than the name of the page.  The default settings of $GroupHeaderFmt and $GroupFooterFmt perform the equivalent of an (:include:) of the GroupHeader and GroupFooter pages.
- PmWiki's ReadPage() function no longer supplies default text for non-existent pages -- this is now decided by whatever functions need the page.  (As of 2.0.devel9 the default text is still stored in 
$DefaultPageTextFmt, however.)
 - $SearchExcludePatterns is now simply 
$SearchPatterns and can be chosen by the list= parameter to (:searchresults:) and (:pagelist:).  See Cookbook:SearchResults.
 - $EnablePerGroupCust is now 
$EnablePGCust.
 - $TableCellAttr is now 
$TableCellAttrFmt.
 - $Url is now $LinkUrl.