Re: Breaking change between YAML 1.1 and 1.2 with multiple documents

Well... that's why it says "YAML 1.2 is compatible with 1.1 for *most*
practical applications - this is a minor revision.". Directives were/are
pretty rarely used in practice. There are other subtle incompatibility
issues, due to the requirement of being 100% compatible with JSON.


On Wed, Jul 23, 2014 at 1:05 AM, Antoine Aubry <[email protected]> wrote:

> According to the YAML 1.1 spec
> <http://yaml.org/spec/1.1/#l-first-document>,
>
> If the document specifies no directives, it is parsed using the same
>> settings as the previous document.
>>
>
> However, the YAML 1.2 spec <http://yaml.org/spec/1.2/spec.html#id2800132>
> states that
>
> 9.1. Documents <http://yaml.org/spec/1.2/spec.html#id2800132>
>> A YAML character stream may contain several documents. Each document is
>> completely independent from the rest.
>>
>
> and makes no mention of inheriting directives from the previous document.
> This change might cause subtle bugs when using a 1.2 processor on a stream
> that was designed assuming version 1.1. Am I correctly interpreting the
> specs?
>
> In the initial paragraphs of version 1.2, it is said that
>
> The primary objective of this revision is to bring YAML into compliance
>> with JSON as an official subset. YAML 1.2 is compatible with 1.1 for most
>> practical applications - this is a minor revision.
>>
>
> This makes me wonder if this change was intentional, or if was an
> overlook. Can someone clarify?
>
> Thanks,
>
>       Antoine Aubry
>
>
>
>
>
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