SugarDaddy: Ch 5 Comments

First of all I'd like to wish everyone a happy Turkey Day, get fat and watch football people, it's a beautiful thing...

My second comment is about Ch 5 on XPaths. I found that this chapter really pulled together Ch 3 & 4 for me. It actually answered my previous post (I guess I should have just read the next chapter).... Here is my understanding of the material.

Templates and match patterns basically go out and retrieve whatever nodes are specified in their axis::nodetest[predicate] match pattern. These nodes sort of get put into some magical computer barrel, where the instructions (apply-templates, value-of, copy....etc....) can come in and pick from the barrel what it chooses.

This process seems to be fairly analogous to the SQL GROUP BY and HAVING statements that we used previously in the course. GROUP BY would go out and put things into groups, and then the HAVING statement would filter those groups. It may be a weak analogy but it's just sort of how I'm thinking about it.....

Just a couple of other quick observations....
The parent axis abbreviation .. is the same as the old DOS .. used after cd to go to the parent directory

The old match = "house_statistics" example from our xsql labs meant that house_statistics was actually a location step with no axis or predicate, only a node test known as house_statistics

Now I KNOW WHY THAT WORKED!!!

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