Searching the Help
To search for information in the Help, type a word or phrase in the Search box. When you enter a group of words, OR is inferred. You can use Boolean operators to refine your search.
Results returned are case insensitive. However, results ranking takes case into account and assigns higher scores to case matches. Therefore, a search for "cats" followed by a search for "Cats" would return the same number of Help topics, but the order in which the topics are listed would be different.
Words and Phrases
| Search for | Example | Results |
|---|---|---|
| A single word | cat
|
Topics that contain the word "cat". You will also find its grammatical variations, such as "cats". |
|
A phrase. You can specify that the search results contain a specific phrase. |
"cat food" (quotation marks) |
Topics that contain the literal phrase "cat food" and all its grammatical variations. Without the quotation marks, the query is equivalent to specifying an OR operator, which finds topics with one of the individual words instead of the phrase. |
Using Boolean Operators
| Search for | Operator | Example |
|---|---|---|
|
Two or more words in the same topic |
|
|
| Either word in a topic |
|
|
| Topics that do not contain a specific word or phrase |
|
|
| Topics that contain one string and do not contain another | ^ (caret) |
cat ^ mouse
|
| A combination of search types | ( ) parentheses |
|
Nillable attribute
The nillable attribute specifies whether or not an explicit NULL value can be assigned to the element. True enables an instance of the element to have the NULL attribute set to true. The NULL attribute is defined as part of the XML Schema namespace for instances. The default is false. This attribute is optional.
The nillable attribute is analogous to the SQL concept of NULL and is useful for dealing with the ambiguity that may otherwise surround an empty XML element value. With SQL there is a difference between a NULL value and a column containing a varchar of length zero. Similarly, in an XML schema there is a difference between an XML element containing no text value and one which is explicitly marked with xsi:nil=”true”.
Unless the XML schema indicates that an XML element is nillable, you cannot specify the nillable attribute for the element.
The following sample code with the nillable attribute can be found in the schema definition section:
<xs:element minOccurs="0" name="IncidentID" nillable="true" type="cmn:StringType" />
