Proximity search. This is the default method and returns a match when all the search terms (see Note) occur within a paragraph (extracts provided). Fragmentary text – in tables, footnotes, etc. – is not searched. Consequently, use the frequency or name search methods where such areas should be included.

Name search. This is suitable for searching for a single phrase occurring anywhere in site documents except the title. No extracts, but relevant sections will be highlighted in documents called from the returned results.

Frequency search. Articles containing all the search terms are ordered according to frequency. No extracts or highlighting.

Title search. Enter no more than 5 words. A list of articles containing any of the search terms in their titles is returned

Note. Enter a maximum of 5 words/phrases using English alphanumeric characters and, optionally, hyphens (but see below). Avoid the inclusion of hyphens where possible; where hyphens are used, also search for the corresponding non-hyphenated phrase. Whole words, rather than fragments, are matched, though a singular noun will match its plural and the infinitive of a verb its other tenses where these are formed regularly. Within quoted phrases, periods, commas, colons and possessive apostrophes can be used in addition to alphanumeric characters. The use of any other symbols will generate an error with the following exceptions: double quotes are required to delineate phrases in proximity and frequency searches but should not be used in name or title searches. Unless included in a phrase, common words (including conjunctions, articles, prepositions, pronouns, comparatives etc.) are excluded from the search term list. In the context of this site asbestos is a common word.