Categories or tags, or the possibility of multi-parameter categorization.

As I wrote earlier , I was faced with the task of sorting out information about various methods of teaching foreign languages and, on its basis, creating the most optimal system for learning languages .
The problem is that philologists, as humanists, do not pay any attention to the classification and systematization of their methods. Since the issue is already not one hundred years old, historically it turned out that the authors called their methods , guided by completely different criteria, or simply called the method by the name of the author. When there were no more than one or two dozens of methods , this did not cause any particular difficulties, but at the moment when their number has exceeded one hundred, not counting minor modifications and improvements, even leading scholars cannot figure this out. Moreover, objectivity is hampered by a very strong commercial interest, causing endless ideological disputes in the style of “pointed-points against blunt-tips”.
And what does this have to do with Habrahabr? - the attentive reader will ask. The most immediate. Only here are people who know best how to create and organize information on the Internet , taxonomy and folksonomy, catalogs and tegeh, and I strongly hope for their advice.
So, the essence of the question. I identified ten key parameters that describe any method with reasonable sufficiency ( in the form of a table here ), and tried to compile method catalogs based on two blog-site systems I know, i. representing on the basis of a single engine the possibility of both blogging and site creation. On mylivepage e is the project PHILOLINGE , on ucoz - the recently launched website FILOLINGVIA
But neither there nor there I can not completely solve the problem of systematization and classification.
Yukoz, in addition to more attractive design and technical capabilities (which, on the other hand, causes difficulties with control and configuration), provides chic two-level catalogs. Taking into account the fact that they are fully customizable and they can be created in several types, up to four hierarchical levels of information ordering are obtained:

1. View directory.
   Directory section.
   Directory category.
   Material catalog.
   It would seem that still need? Spread out methods for daddies and rejoice! What I started to do, but the question raised by me did not solve it. After all, the catalogs of Yukoza are rigidly linear and one-parameter, i.e. each material can be only in one category of the catalog. And if I want to classify the methods according to ten parameters at once, I can create ten sections, in them the required number of categories, but I will have to manually place each material 10 times into these sections, which, naturally, no sensible person will be engaged in!
   Maybe instead of the taxonomy of Yukoza, the folksonomy that has become so popular will help me? I tried the wonderful service mylivepage, known for its simplicity and democratic character, and widely offering the possibility of tagging. But there are more problems here. There is only one level of folders on the service, i.e. creating a hierarchical structure will not work in principle, and tags have no hierarchy by definition. If it were possible to create your own tag cloud in any folder, or to have the ability to organize tags hierarchically, this would solve the problem.
   Those. I want to be able to assign any information on one or several tags from ten fixed lists, and the ability to organize articles in accordance with the hierarchy of these categories. For example:
   “The method of West is logical , direct , with the usually passive role of a teacher and explanations in a foreign language , individually - group , with emphasis on reading , semantic , verbal-auditory , intellectual-communicative. "
   and further if the visitor selected any of these tags, this material would be displayed in the list.
   But I do not know the service with such features. And you?