The
term Item
in Traction is roughly equivalent to Paragraph. When you post an
article, Traction divides the body into items by breaking the content
along block boundaries. Generally,
a block begins with a new paragraph; but headings, tables, lists are also
considered to be in their own blocks.
After
Traction divides the article content into items, it assigns each item
a unique and persistent numeric identifier. It
is these numeric identifiers to which labels are actually attached. Therefore,
even if you rearrange the order of the paragraphs in the article, as long
as these item markers are kept with their original blocks, any labels
that may be attached to the items will remain attached to the same content.
Traction
assigns the unique identifiers; you should never attempt to assign a new
unique identifier yourself, since this could upset the label-to-item correlation.
If you remove a marker while editing an article without removing the content
for that item, the content will be assigned a new identifier, and the
categorizations represented by the labels will effectively be made invisible.