Android follows normal java package conventions plus here is an important snippet of text to read (this is important regarding the wide use of xml files while developing on android).he concept comes from Package Naming Conventions in Java, more about which can be read here:*. http://en.wikipedia.org/wiki/Java_package#Package_naming_conventions. Source: http://www.quora.com/Why-do-a-majority-of-Android-package-names-begin-with-com.
Files that contain the .3ds file extension are most commonly associated with the Autodesk 3D Studio software.he 3DS files that are used by the software contain a variety of information used to form a three dimensional scene, like coordinates, list of polygons used to form the objects, color information etc.
AutoCAD drawing set description files are settings files saved in the DSD format, and these DSD files are also called properties files. The AutoCAD 2013 software creates and uses files appended with the .dsd extension. This application is classified as CAD productivity software, and the data in a DSD file usually consists of settings or details used for the publication of digital drawings stored in DWF formats.