Defining Categories
Attributes
Each Object
Model or Non-spatial Table Model category may have several descriptive attributes
in the database, which must be created together with the data model.
See also:
What
is an Information Layer in SPRING and how to create one?
SPRING
Conceptual
Model
Data
Model
-
How
to define it
Creating an Attribute
For the SPRING category
models (Object or Non-Spatial), it is possible to define descriptive
attributes in the database, that can be created in the "Category Attributes" window.
The attributes can be
either Integer, Real, Date, or Text type. For text
type variables the maximum number of characters has to be defined using the Size
option.
Creating an Attribute:
-
select a Category in the "Object and Non
Spatial Table" window;
-
click on Attributes .
-
type in the attribute's Name
(8 characters, at most);
-
select the variable Type: Integer, Real, Date,
(date /hour) and Text. For Text type variables type the
size (in characters);
-
click on Insert to
add the attributes;
-
click on Delete to remove a selected attribute.
-
click on Apply to permanently insert the attributes in
the database.
-
click on Metadata... to associate a description to the attributes.
WARNING: The geoid
attribute can not be removed or changed, because this attribute is
responsible for the geographical element association.
See also:
How to create a Project.
How to create a Database.
How
to define a Category or a Class Visual Aspects.
How to link tables (Object and Non-Spatial).
Defining Categories or Classes Attributes
Removing an Attribute
Removing a table's
attribute means that a table's column will be removed. If the user wants to
use a database manager to remove attributes, instead of removing them via
SPRING, the user has to also remove the .mdx file, if the Dbase manager is being used.
If other manager is being used this task in not required.
Removing an Attribute:
-
click on Attributes for the field one
wants to remove;
-
click on Delete and
confirm the
message;
-
clickon Apply to
save the table's changes.
See also:
How to delete a Project.
How
to
delete
a Database.
Defining
Categories
or
Classes
Attributes
How
to Edit New Attributes in Filled Tables
To edit the table
attributes inside a database in SPRING, the user can use a commercial DB
manager, or SPRING.
When the database was
created the database manager, such as Dbase, Access(Windows),
MySQL, PostGreSQL or Oracle, was selected to store alphanumeric tables.
Once the table is created in one of these managers we have:
-
a DBF file (standard in dbase IV) when DBase is used;
-
a single MDB file (in case
spring.mdb)
with several tables when the Access is used;
-
a table inside a database when the other managers are used;
In each case, change only
the table structure for Objects or Non-Spatial.
See also:
How to delete a Project.
How
to
delete
a Database.
Defining
Categories
or
Classes
Attributes
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