Are there any free Xml Diff Merge tools available

Question

I have several config files in my  net applications which I would like to merge application settings elements etc   I was about to begin doing it manually as I usually do  however thought there must be an XML diff GUI tool available somewhere    The tool would be able to go to the element level to compare and display the differences etc    However Google gave no substantive free tool results and no hints for anything of value   Is such a tool available   That is very useful  For free    Thanks in advance      Edit   Here is a bit of clarification of the functionality that would turn my error-prone  tedious manual job into a 1-minute simpler task  and potential to automate    In KDiff3  you can do a diff merge of entire directories   There is a hierarchical diff which is very accurate  user-friendly and clear   I was interested in finding a similar solution  however instead of directory hierarchy  an XML element hierarchy   If there is no such open source software  I am considering creating one on CodePlex to provide this functionality

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There are a few Java-based XML diff and merge tools listed here   Open Source XML Diff written in Java  Added links    diffmk VMTools OpenSHORE XML Merger xxdiff

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Pretty Diff tool was created with XML in mind   Just ensure you click the option for  markup    http   prettydiff com

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Altova s DiffDog has free 30-day trial and should do what you re looking for   http   www altova com diffdog diff-merge-tool html

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While this is not a GUI tool  my quick tests indicated that diffxml has some promise  The author appears to have thought about the complexities of representing diffs for nested elements in a standardized way  his DUL - Delta Update Language specification     Installing and running his tools  I can say that the raw text output is quite clear and concise  It doesn t offer the same degree of immediate apprehension as a GUI tool  but given that the output is standardized as DUL  perhaps you would be able to take that and build a tool to generate a visual representation  I d certainly love to see one   The author s  links  section does reference a few other XML differencing tools  but as you mentioned in your post  they re all proprietary

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This is a diff engine for java developers  but it comes with a demo interface - you might be able to use it  https   community emc com docs DOC-5042

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I use TortoiseMerge  which is included in TortoiseSVN program  And we have talked about File Diff tools in this thread  not dedicated to XML though  https   stackoverflow com questions 1830962 file-differencing-software-on-windows

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Have a look at  at File comparison tools  from which I am using WinMerge  It has an ability to compare XML documents  you may wish to enable DisplayXMLFiles prefilter    DisplayXMLFiles dll - This plugin pretty-prints XML files nicely by inserting tabs and line breaks  This is useful for XML files that do not have line returns in convenient locations      See also my feature comparison table

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A7Soft provide XML comparison tools freeware and shareware   http   www a7soft com

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I recommend you  to use CodeCompare tool  It supports native highlighting of XML-data and it can be a good solution for your task

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I wrote and released a Windows application that specifically solves the problem of comparing and merging XML files   Project  Merge can perform two and three way comparisons and merges of any XML file  where two of the files are considered to be independent revisions of a common base file    You can instruct it to identify elements within the input files by attribute values  or the content of child elements  among other things   It is fully controllable via the command line and can also generate text reports containing the differences between the files

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KDiff3 is not XML specific  but it is free  It does a nice job of comparing and merging text files

[xml] Are there any free Xml Diff/Merge tools available?

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