getattr
Purpose
Synopsis
function getattr(doc:xmldoc, n:integer, name:string):text
function getboolattr(doc:xmldoc, n:integer, name:string):boolean
function getintattr(doc:xmldoc, n:integer, name:string):integer
function getrealattr(doc:xmldoc, n:integer, name:string):real
function getstrattr(doc:xmldoc, n:integer, name:string):string
Arguments
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doc
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Document to use
|
|
n
|
Node number (must be an element)
|
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name
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Name of the attribute
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Return value
The value of the attribute or an empty string, 0 or
false depending on the expected type.
Example
The following code extract prints the contents of 'name' (leftbound in a 10 character space) and the attributes 'id' of all 'employee' nodes, and the 'id' of their parent node.
declarations
DB: xmldoc
AllEmployees: list of integer
end-declarations
getnodes(DB, "personnelList/region/employee", AllEmployees)
forall(p in AllEmployees)
writeln(textfmt(getvalue(DB, getnode(DB, p, "name")), -10),
"(ID: ", getattr(DB,p,"id"), ") ",
"region: ", getattr(DB, getparent(DB, p), "id"))
Output produced by this code will look as follows:
Lisa (ID: L234) region: EMEA James (ID: J876) region: APAC Sarah (ID: S678) region: AM
Further information
1. Values of attributes are stored as
text objects: the first version of the routine returns a reference to the object containing the attribute value. Modifying this text will also alter the attribute value. Using one of the alternative versions of this routine allows to avoid having to perform a type conversion. Note however that no validation is performed and a conversion error will result in a 0 for a number and
false for a Boolean without raising any error.
2. A default value (empty string, 0 or false) is returned if the requested attribute is not defined. Use function testattr to check whether a given node has a particular attribute.
Related topics
Module
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