Convert/parse XLSX document to XML

Closed - This job posting has been filled and work has been completed.

Job Description

Need a script that will convert an XLSX (excel) document to an XML document of specific format, including error handling and parsing some fields. Preferably utilizing XSLT but can be done using any technology. Ideally should be executed by running a command line with parameters (input_file output_file xslt_file). The excel file consists of around 500 lines and will be provided.