WEBVTT 00:04.110 --> 00:09.900 In this video we're going to take a look at inheritance and the three different types of directives 00:10.440 --> 00:13.060 we've already touched on the concept of inheritance. 00:13.080 --> 00:19.290 And you've most likely by now realize that as with scope in a typical programming language an engine 00:19.290 --> 00:24.090 X context inherits configurations from its parent contexts. 00:24.580 --> 00:30.440 This is generally a very straightforward top to bottom inheritance starting at the main context. 00:30.460 --> 00:39.050 The file itself down to that HTP context then the server context and finally any location context. 00:39.250 --> 00:45.400 That said Inheritance isn't always the straight forward and will vary depending on the type of directive 00:45.430 --> 00:49.090 being inherited from the three main directive types. 00:49.090 --> 00:54.480 Is this standard directive the array directive and the action directive. 00:54.520 --> 00:57.530 Now I won't be demonstrating the different types of directives. 00:57.550 --> 01:04.210 As I've previously done with small configuration changes but rather I compiled the sample configuration 01:04.240 --> 01:08.680 with detailed comments explaining how each directive works. 01:08.680 --> 01:11.490 So let's go over that first up. 01:11.500 --> 01:15.510 No one here we have what's called an array type directive. 01:15.700 --> 01:22.270 This is a directive that can be declared multiple times without overriding the previous the axis log 01:22.300 --> 01:28.810 being the perfect example of an array directive array directive sets inherited straight down meaning 01:28.870 --> 01:35.120 all child contexts of this main context will share these log file settings. 01:35.230 --> 01:37.860 For example the server context here. 01:38.570 --> 01:42.930 If I were ever a child context redeclare is this directive at all. 01:42.950 --> 01:48.000 So even only once the parent directive gets overridden completely. 01:48.260 --> 01:53.030 As would be the case here in this site to dot com server context. 01:53.030 --> 02:00.530 This entire context and all it's child context so these locations will have access logs completely disabled. 02:00.590 --> 02:04.610 Unless of course one of these child contexts declares its own access log. 02:04.670 --> 02:06.880 Again and so on. 02:06.890 --> 02:10.620 Then secondly we have this standard directive. 02:10.670 --> 02:16.190 This being the most common directive type and can only be declared once in a given context. 02:16.190 --> 02:22.640 Inheritance working exactly the same as the array directive parent to child with the child being able 02:22.640 --> 02:25.410 to override it with its own declaration. 02:25.760 --> 02:30.390 And finally the third directive type is the action directive. 02:30.590 --> 02:38.090 This being directives that invoke some or other break or action in the configuration for example a redirect 02:38.150 --> 02:46.250 via the return directive a response such as this one also via the return directive or alternatively 02:46.250 --> 02:50.830 a rewrite from either a rewrite or try files directive. 02:51.110 --> 02:57.320 Inheritance simply does not apply to action directives as they stop the normal flow of the configuration. 02:57.930 --> 03:03.450 That covers the three types of directives and the basics of inheritance which again is very important 03:03.450 --> 03:04.510 to understand. 03:04.620 --> 03:08.570 So be sure to download this linked configuration file for reference.