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* XML tree is contained below the _content_ node if read was successful
** status is set to error otherwise
* updated test transformation accordingly
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* updated test transformation accordingly
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* A call to _read-file_ now returns a _content_ and _status_ node
** this enables XSL transformations to easily react to io related errors
* fixed bug in path resolution
** boost::filesystem _canonical_ method is throwing and exception when the given path does not exist, this pulled down the whole stack
** replaced call to _canonical_ with call to _absolute_ which does not have this requirement
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* the plan to return XML-nodes from each external function requires a better way to manage the lifetime of many xerces DOM document instances and their support class instances
** this is why DomDocumentCache and DomDocumentCache::item were implemented
** based on std::map so we can easily access the result of old function calls
* changed external read-directory function to return the children of the document node instead of the document node itself
** removes unnecessary cruft in function calls
** will make returning status codes alongside the function result more pleasing to the eye
* updated test transformation to reflect new features
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* they are marked appropriately by a _type_ attribute
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* output is generated from XML hand-generated in a std::stringstream
** while this works reasonably well it is not how it should by done, i.e. this will have to be reimplemented using xerces / xalan constructs
** => this is intended to try out how a read-directory could work in a XSLT context
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* _read-directory_ lists all files in a given directory
** currently text-only output, xml planned
* improved FilesystemContext path resolution (relative path is fully resolved by boost::filesystem)
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* one expects a read-file function to work relative to the directory the transformation is located and not to the executable's location
** from the perspective of the user the transformation is the application, not the actual executable
* removed PlattformGuard struct from TransformerGuard (now TransformerFacade)
* TransformerFacade is instatiated with the appropriate relative working path
** i.e. it will have to be instantiated for every directory containing one or more transformations
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* command "read-xml-file" reads a XML file and allows it to be transformed by the calling XSLT
* this will allow workflows like the following:
** a tranformation reads all the markdown files in a directory
** these markdown files are converted to a xml representation by a external function calling a appropriate C++ markdown parser
** the XML representation of each markdown file is converted to XHTML inside the XSL transformation
** ... and embedded into the output XHTML document
** => all inside a single XSL tranformation
*** i.e. it is provided with only a empty dummy XML input file and fetches the actual input by itself
* as all current code contained within this repository this is just a quick and dirty proof-of-concept and not in any way good code
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* changed relative paths of input files to accomodate builds inside a separate directory
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* quick and dirty proof-of-concept for adding plain-file access to XSLT
** based on Apache Xalan XSLT processor
* The idea is to create something like a static counterpart to Symphony CMS
* Adding functions to XSLT for file system, plain file and binary file (read)-access
* This project aims to test how such functionality can be integrated into XSLT
** if it works it could be developed into a nice static content transformation system
* Contrary to the popular opinion I actually like XML and XSLT when used responsibly
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