lanky Girl

2nd Week in Dita (3.2 text/Html)

In DITA on October 11, 2009 at 8:18 pm

This week In DITA we have been looking at the representation and storage of data. As humans we are used to our counting system being based on base 10 (Butterworth,2009) with computers this is not the case, computers count in base 2 known as binary. Binary code is a series of zeros or ones which are supposed to be the different states a computer can have ON or OFF.  For example the number 157 would be 10011101 in binary. To be honest I struggled with the concept  of binary at first but i found a very helpful tutorial here. A single zero is known as a bit and a sequence of bits equals a byte. Bytes put together form files.

So how does all these bits become text? The answer is ASCII.  ASCII or the American standard code for information interchange is a system of computer code in which seven bit sequence can be encoded as 128 characters. For e.g 100 0010 equals the uppercase letter B in ASCII.

As the ASCII character set is so basic, it is more commonly used for writing source code for Windows control files such as Config.sys, and Win.ini.  It also used to for transfer data among applications that do not share a common file format. For example files that are edited in Notepad and saved with the .TXT extension can later be opened by word processors such as MS Word.

During our lab session we were asked to open a Microsoft Word document with a .DOC extension in Notepad. When we did this we were able to see that Microsoft documents contain Metadata. Metadata is essentially data about data it is used to describe, locate  and retrieve information more easily. In a typical Microsoft word document metadata can include the name of your computer, the names of previous document authors and template information. A way of including Metadata is through Markup. I will go in more detail about Markup in my next blog when talking about Html.

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Codd, E.F. (1970).”A Relational Model of Data for Large Shared Data Banks”. In: Communications of the ACM 13 (6): 377–387.

blog 8 (page 38) (Manning, Raghavan, Schütze, 2009)

blog 9

blog 10

Rosenfeld, L. and Morville, P. (2007), Information Architecture for the World Wide Web (3rd Edition), Sebastopol, CA.:O’Reilly, page 4


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