| http://www.w3.org/ns/prov#value | - one reason to do this is that you do not always know how much memory you will need. for example : you read from a file that is stored on the disk. let's say you are writing an image viewer that reads all kinds of images. what you could do know is have some fixed sized array he is known to be big enough to hold all your image data (which is unlikely because who knows when there will be 64bit image
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