OpenXMLrakenteeseen

OpenXMLrakenteeseen refers to the internal structure of Open XML file formats. Open XML, also known as Office Open XML or OOXML, is a zipped, XML-based document format developed by Microsoft. It is the default format for Microsoft Office applications like Word, Excel, and PowerPoint. The term "rakenteeseen" is Finnish for "into the structure" or "to the structure," indicating a focus on how these files are organized.

A typical Open XML file is essentially a ZIP archive containing a collection of XML files and other resources like images. The core of the structure is defined by several key components. A folder named "_rels" contains relationship files that describe how different parts of the document are linked together. The "docProps" folder holds metadata about the document, such as author, creation date, and title. The main content of the document resides in folders like "word," "xl," or "ppt," depending on the file type.

Within these content folders, specific XML files store the actual data and formatting. For example, in a Word document (docx), the "document.xml" file contains the main body text, while other XML files might store styles, themes, and settings. Similarly, an Excel file (xlsx) uses "workbook.xml" for worksheet information and "sheetN.xml" (where N is a number) for the data in each sheet. Understanding this internal structure is crucial for developers working with Open XML files programmatically, enabling them to read, write, and manipulate document content without necessarily using the originating application.