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“
Non-defining relative clauses
”
give additional and non-essential
information about the noun or phrase they refer to, and there are

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“
commas
” before and after them based on punctuation rules if they are
put in the middle of an independent clause. Therefore, the whole relative
clause could be omitted from the sentence without making changes to its
meaning. In case they end the sentence, using a comma before them is
mandatory. Note that the relative pronoun “
that
” cannot be used in
these types of clauses.
Non-defining relative clauses are functional structures in writing
diagrams, flowcharts, and maps as they provide additional
information about something for better clarity. They also enhance
cohesion, and as they extend sentences, meeting the word limit
would not be problematic in this type of writing any longer.
For example
Paris
,
which is the capital city of France
,
is a popular tourist
attraction. (The relative clause gives additional information about the
subject, and in case it is removed from the sentence, the meaning of
the sentence would not be affected. Note that there are two commas
before and after the relative clause.)
Her mother works in an IT company
,
which is located in Germany.
(The relative clause gives non-essential information about a
workplace and could be omitted from the sentence without harming
the sentence structure or its meaning. There is a comma before the
relative clause separating it from the main clause.)
3) Sequencing words
Implementing sequencing words and phrases is quite necessary for describing
diagrams or flowcharts as they show a clear transition among steps to make
them easier to follow. Furthermore, they provide writings with better
cohesion.