.yaml

Although it is no less general than XML, YAML is a great deal simpler to read, edit, modify, and produce than XML.

You need to register your application on GAE before you deploy, as you need its name in app. yaml (as shown in Part 1).

None of the semantic and syntactic benefits listed above are really the strongest reason for using YAML for my application.

The syntax of YAML combines the contextual typing of Perl, the indentation structure of Python, and a few conventions from MIME standards.

Fixtures can be in two different formats: YAML or comma-separated value (CSV) format.

Less dynamic languages would not fit as well with YAML.

The YAML Web site gives exact specifications (see Resources), but this brief sample gives you a pretty accurate idea of the basic elements.

A number of other languages have data models that will play nice with YAML, but no one has written libraries yet.

And, significantly, YAML maintains the distinction between ordered and associative collections.

Moreover, the error or exception that is thrown then is usually not clearly related to the YAML configuration file.

Many times, when there is a problem in a YAML file, it is not detected until the value actually needs to be used.

Perl-based approaches to application configuration range from XML or YAML to the Getopt module to Perl code in the configuration file.

BYON allows you to give JClouds a file or web url with machine details in yaml syntax.

To handle such a URL, we once again add a section to our app. yaml file.

There is a certain sense to this, however: YAML does what markup languages do, but without requiring any, well, markup.

The identifier belongs in your application's app. yaml file as well.

As an added bonus, you can very easily edit YAML in a text editor.

Learn more about YAML, a human friendly data serialization standard for all programming languages.

The easiest way to see why you would want to use YAML is to look at some code in different formats.

Customizable: The default configuration language is YAML, but it can be INI, XML, or whatever format the developer prefers.

While JSON provides a data format that is simpler than either YAML or XML, reStructured Text can be a pretty complex tool.

This introduction is intended to suggest some situations where YAML provides a better object serialization format than XML.

By default mustache will try to render a Mustache template using the YAML front matter you provide.

The YAML format simply matches the data structures of dynamic languages better.

Additionally, symfony authorizes PHP code in YAML files and other tricks to make the configuration system even more flexible.

Listing 13 uses a language called YAML, which describes structured data (see Resources).

YAML shows structure through indentation and is fast to write.

Another text format for configuration files is YAML.

You will see the PHP files corresponding to your YAML configuration.

To do this, we edit the app. yaml file and add a new section.

That's why some of them don't use the YAML format.

That is the only reason we need the new rule in app. yaml.

For our test, we prefer to use a YAML fixture.

At this stage, the main thing to know about YAML is that whitespace is significant.

That is, anything you can represent in XML, you can represent (almost always more compactly) in YAML.

Why did we need a new mapping in app. yaml?

YAML isn't too complicated, but if you've never used it before, it can seem confusing.

Instead of using data formats such as XML or YAML, you can use AppConfig with some extra work to achieve more advanced goals.

For example, the existing YAML libraries come with adequate, but not great, conversion tools for moving between XML and YAML.

Parse the first YAML document in a stream

First of all, never use tabs in YAML files;