Altova DiffDog is the dedicated differencing program created for developers and power users.
 This easy-to-use synchronization tool quickly compares and merges source code and text-based files or directory pairs via its elegant visual interface. DiffDog provides advanced XML-aware differencing and editing capabilities based on those popularized in Altova XMLSpy, and integrates with any version control system that supports external differencing applications.
 
For optimal efficiency, you can edit content directly within its differencing display, merge changes, and instantly re-compare. Intelligent syntax-coloring, line numbering, indentation guides, folding margins, and other innovative features assist in comparing source-code and XML files. Its XML differencing capabilities include DTD/schema-based validation, well-formedness checking, intelligent entry helpers, optional entity resolution, consideration of attribute and child element ordering, and more.
DiffDog lets you examine and compare OOXML documents with XML-aware functionality. Moreover, it allows you to compare XML files in the advanced text view or the tabular grid view first introduced in XMLSpy. DiffDog also provides powerful capabilities for directory comparisons.
 
DiffDog can intelligently process directories, applying special comparison rules based on each file type, and even open and edit file pairs directly from the directory comparison view. DiffDog even inspects Zip archives and compares contents based on the original file types.
 
DiffDog lets you selectively move files into target directories or synchronize entire directories in a single step. With all this, you can reconcile source code, XML, or binary file versions, or sync-up files on your laptop and desktop computers in a single step. You can even export differencing reports. Let DiffDog 2009 Professional Edition track down the differences in your essential development and data integration projects

· XML Editing & Validation
· Well-formedness checking
· Validation (DTD & schema-based)
· Intelligent Editing (DTD/Schema based entry-help)
· Find & Replace with enhanced XML capabilities
· Code-completion & syntax-help
· Pretty-printing of XML files
· Enhanced Grid & Table View
· XML Differencing
· Compare single files
· Compare entire directories
· Two comparison modes: textual or XML-aware
· Multiple options for XML-aware comparisons, such as entity resolution, ignore attribute order, ignore comments, etc.
· Show differences in Text or Grid view
· Merge option to help migrate changes from one file to the other
· File Comparison
· Comparing any text files
· Differences indicated with colored highlights and connecting lines
· Adjustable colors for indication of differences
· Comparing files in advanced text view
· Word wrap
· White space indicators
· Line feed indicators
· Configurable differencing settings for different file extensions
· Synchronized vertical scrolling
· Synchronized horizontal scrolling
· Support for multiple open file/directory comparisons
· Command line operations
· Provides list of recently compared file pairs
· Source code conformant syntax coloring
· Expand/collapse all folding nodes
· Bookmarks & bookmark margin
· Visual indentation guides
· Text-folding margin
· Option to show differences within lines
· Comparing XML files in grid / table view
· Two comparison modes: textual or XML-aware
· Multiple options for XML-aware comparisons: entity resolution, ignore attribute order, ignore comments, etc.
· Export differencing results in XML format
· Export differencing results in Unix-diff format
· Ignore particular elements or attributes during XML differencing
· Directory Comparison
· Compared directories displayed in expandable/collapsible trees
· Compare directory components by file size and date or by file content
· Differences indicated with color-coding and icons
· Expand/collapse all folders in directory
· Support for multiple open file/directory comparisons
· Ability to start file comparisons from within directory comparison
· Command line operations
· Provides list of recently compared directory pairs
· Automatic re-load of directory changed externally
· Synchronization capabilities (copy/insert/delete)
· Support of filters (ignore, compare only)
· Source-Code & Text File Editing & Merging
· Bi-directional merging of individual differences
· Text View with syntax-coloring
· Line Number Margin
· Text-folding Margin
· Bookmarks & Bookmark Margin
· Visual indentation guides
· Find & Replace based on Regular Expressions
· Direct editing of files in File Comparision window
· Files compared dynamically during editing
· Unlimited undo for editing and merging
· Find & replace based on regular expressions
· Reload original file from disk
· Automatic back-up of original file
· Automatic re-load of file changed externally
· Connectivity
· Filesystem access
· Platforms
· Microsoft Windows application (NT 4.0, 2000, XP, Server 2003)
· International support
· Unicode (UTF-7, UTF-8, UTF-16, ISO-10646, UCS-2, UCS-4)
· All major Characterset Encodings (ASCII, ISO-8859, CJKV, etc.)

Requirements:
· Internet connection for the trial key
· Pentium III processor
· 800 MHz recommended
· 64MB RAM
· 50MB available on hard-disk

Limitations:
· 30-day trial

What's New in This Release:
· Support of Windows 7
· Pretty-Print for XML files