… and annotations (page comments, highlights, stuck and floating notes) in the Diigo sense?
independent of the XML document structure
A document is a sequence of items
is composed of an XML document and a set of
annotations.
Annotation keys and values are strings
each item conceptually has its
own annotation map
more efficient to
have just one annotation map for each consecutive run of items with
the same annotations
serialization of the document without annotations
into a string is not formally an XML document
current annotations update, which is a map of annotation
keys to pairs (old-value, new-value), where old-value and
new-value are either null or an annotation value
After the final component, the annotations update must be empty
Document operation components can be divided into four classes
do not directly affect the document or
the cursor
annotation boundaries (annotationBoundary) change the current
annotations update
interaction
with annotations
Appendix A.
Protocol Schema
message AnnotationBoundary {
// This field is set to true if and only if both ends and changes are
// empty. It is needed to ensure that the optional annotationBoundary
// component field is not dropped during serialization.
optional bool empty = 1;
// MUST NOT have the same string twice.
repeated string end = 2;
// MUST NOT have two updates with the same key. MUST NOT
// contain any of the strings listed in the 'end' field.
repeated KeyValueUpdate change = 3;
}
"This how-to describes how to configure an application to run on Google App Engine for Java.
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