The way in which synonyms are matched
by the Auto map function,
to create mappings between specific inputs and outputs, follows a
set of rules.
- Fixed value outputs and mapped outputs are excluded in name matching.
Any output field that has a fixed value is excluded in name matching.
Any output that is already mapped, or under a container that is already
mapped, is excluded from name matching.
- The synonym matching is done by using the name of an element,
an attribute, or a database column regardless of its type. If an input
and an output have the same name, it is a match, regardless of the
kind of, and XSD type of, the input and output. An element, an attribute,
and a database column can all form a match if their names are the
same.
- The synonym matching of alphanumeric characters is not case-sensitive,
and is identical to that used in Mapping input to output elements automatically.
- Namespace or namespace prefixes do not participate in synonym
matching. XML namespaces are excluded from name matching. Therefore, abc:something and xyz:something are
considered the same, as are {http://www.abc.com}:something and {http://www.xyz.com}:something.
- When multiple inputs have the same name as one
output, one mapping is created. However, if you have multiple inputs
with the same name as one output and you choose to map by the same
name (or similar name) and to match descendants, an attempt
is made first to match by path and name. If a match is found, one
transform is made, and no further matches are considered.
- If an input and an output have the same name,
they are not considered a match under the option for synonyms. If
you require a mapping for same-name inputs and outputs, you must also
select the Create transforms when the names of inputs and
outputs are the same option.
- In addition to mapping synonyms, you might want to create mappings
for some, but not all, same-name inputs and outputs. In this case,
you have two options:
- Clear Create transforms when the names of inputs and
outputs are the same, and include the same-name inputs
and outputs in the synonym file
- Select Create transforms when the names of inputs and
outputs are the same, and clear the unwanted mappings
on the second page of the wizard.
- When you select the Map all simple descendants of the
selected elements option together with both same name
and synonym mapping options, the following steps are taken to match
names:
- Compare the relative path and item name of the selected input
and output
- Compare the item name without relative path
- Compare the item name without relative path to synonym
Inputs and outputs matched in a previous step do not participate
in later steps.
- When you select the Map the immediate children of the
selected elements option together with both same name
and synonym mapping options, the following steps are taken to match
names:
- Compare the item name without relative path
- Compare the item name without relative path to synonym
Inputs and outputs matched in a previous step do not participate
in later steps.
Copyright IBM Corporation 2012.
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