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14 Siemens Simatic S7 Driver Online Help

Defining Search Terms

The AND, OR, NOT, and NEAR operators enable you to precisely define your search

by creating a relationship between search terms.

Using Nested Expressions

A nested expression is an expression included inside another expression. For

example, in the query “control AND (address OR system)”, the phrase “address OR

system” is nested (included inside of) the larger set of search terms.

Nested expressions allow you to create complex searches for information. For

example, “control AND ((address OR system) NEAR software)” finds topics

containing the word “control” along with the words “address” and “software” close

together, or containing “control” along with the words “system” and “software” close

together.

The basic rules for searching Help topics using nested expressions are:

• You can use parentheses to nest expressions within a query. The expressions

in parentheses are evaluated before the rest of the query.

• If a query does not contain a nested expression, it is evaluated from left to

right. For example: “Control NOT address OR system” finds topics

containing the word “control” without the word “address,” or topics

containing the word “system.” Conversely, “control NOT (address OR

system)” finds topics containing the word “control” without either of the

words “address” or “system.”

• You cannot nest expressions more than five levels deep.

Using Other Searching Methods

The following options available for searches at the bottom of the search window:

Search titles only – Allows you to search for words in the titles of HTML files.

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Siemens SIMATIC NET Spécifications Page 24