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Is it a system that better classifies topics
Classification is a system for grouping things. People invent classification systems all the time and for the most mundate purposes. Some systems are more coherent --comprehensible to other people-- than other systems.
All things evince to people attributes such as title (name), creation date, dimension (l, w, d) --that parenthetical statement is a group of attributes known as an array--, author, weight, species, leaf, genus, file size, file type, BMI, color (R,G,B), category (politics, fiction, gardening), gestation period, topic (EU election, Il Duce, PES, 18 October Fundraiser) etc. etc. etc.
There is no natural limit to the number of attributes one associates with a thing (possibilities). There is a limit on the number of attributes one needs to sort things into different groups. That limit is a set of rules, or system, to identify all attributes of the things to be sorted.
Category (or "topic" or "section") and creation date (required to perform "chronological order") are the least informative attributes by which to sort things. To be informative at all, category type must be limited to one attribute.
Click to enlarge. GOOG like every other search engine interface displays a list of operations to exclude certain attributes shared by things, so reducing the total number of things located that match more accurately the user's peculiar "interest".
You are unaware of this software functionality?
Diversity is the key to economic and political evolution.
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