XML is an abbreviation for Extensible Markup Langugage. It is method to break a document into a group of tags, subtags, or contents. The syntax of an XML file represents a combination of tags that can reconstruct a document of any sort. The syntax must be followed to represent an XML file correctly. For that to be achieved, it is obligatory to follow a certain arrangement through the following:
Identation is necessary for readability and comprehensibility. It is also important to remove irrelevant or needless whitespaces.
In order to achieve the previously mentioned standards: each open tag can be proceeded by multiple open tags as long as the open tags are subsequently closed in the correct order, i.e the first occuring closed tag must be lead by a similar open tag.
Json offers a lot of great features that are non‐existing in XML: it can be parsed by a standard JavaScript function.
It’s required to reduce the size of large documents/XML files for larger transfers.
To save an amount of space in memory. It removes any extra spaces, or identations.
output a visualization graph of the social network and analyize the graph (most followed user , most connceted user , etc).
(compares two users and outputs the mutual friends between them).
searches for a keyword and ouputs the post(s) where this keyword exists.