</programlisting>

In the first string, the set of trigrams is

<literal>{" w"," wo","ord","wor","rd "}</literal>.

<literal>{" w"," wo","wor","ord","rd "}</literal>.

In the second string, the ordered set of trigrams is

<literal>{" t"," tw",two,"wo "," w"," wo","wor","ord","rds",ds "}</literal>.

<literal>{" t"," tw","two","wo "," w"," wo","wor","ord","rds","ds "}</literal>.

The most similar extent of an ordered set of trigrams in the second string

is <literal>{" w"," wo","wor","ord"}</literal>, and the similarity is

<literal>0.8</literal>.

At the same time, <function>strict_word_similarity(text, text)</function>

has to select an extent that matches word boundaries. In the example above,

<function>strict_word_similarity(text, text)</function> would select the

extent <literal>{" w"," wo","wor","ord","rds",ds "}</literal>, which

extent <literal>{" w"," wo","wor","ord","rds","ds "}</literal>, which

corresponds to the whole word <literal>'words'</literal>.

<programlisting>