Implementation dependent features

Chunking

Supported chunking methods:

• select-topic
• select-document
• select-branch
• by-topic
• by-document
• to-content
• to-navigation.

When no chunk attribute values are given, no chunking is performed.

Error recovery:

• When two tokens from the same category are used, no error or warning is thrown.
  This violates DITA 1.2 spec.
• When an unrecognized chunking method is used, no error or warning is thrown.

Filtering

Error recovery:

• When there are multiple revprop elements with the same val attribute, no error or warning is thrown
• When multiple prop elements define a duplicate attribute and value combination, attribute default, or fall-back behaviour, DOTJ007E error is thrown.

Debug attributes

The debug attributes are populated as follows:

xtrf

absolute system path of the source document

xtrc

element counter that uses the format

element-name ":" integer-counter ";" line-number ":" column-number

Image scaling

If both height and width attributes are given, image is scaled non-uniformly.

If scale attribute is not an unsigned integer, no error or warning is thrown during preprocessing.

Map processing

When a topicref element that references a map contains child topicref elements, DOTX068W error is thrown and the child topicref elements are ignored.

Link processing

When the value of href attribute is not a valid URI reference, DOTJ054E error is thrown. Depending on error recover mode, error recover may be attempted.

Copy-to processing

When the copy-to attribute is specified on a topicref, the content of the shortdesc element is not used to override the short description of the topic.