Remove or Change Data
Removing and changing data is based on reading a database
after all other databases.
The order in which databases are
searched can be changed using the pull-down menu
Options / Data / Database files.
The order is important because for two species with the same name
(but different logK° value),
only the last one will be retained.
Single User
(when there is a copy of DATABASE/SPANA installed on your computer):
- change a logK-value by entering the new value using the menu
Options / Data / Add data!.
The the logK-file New-Data.txt and the element-file
New-Data.elm are then created and these files
are read after the binary database supplied with DATABASE. For two species
with the same name (but different logK° value),
only the last one read will be retained.
- remove components from the list for an element by adding a new component
with the same name but preceeding the name with a @
(in menu Options / Data / Add data!).
For example, adding @Fe 2+
linked to Fe removes Fe(II) from the
components available for iron.
- remove reactions by adding a new species with the same name but inserting
a @ at the beginning of the name.
For example, to remove the species FeOH 2+
just add a species named @FeOH 2+.
The logK° value is not used, because the species will be removed.
Running on a Network server:
- Each user may change or remove data as indicated above.
The database New-Data is then saved on a user directory.
- To make collective changes and deletions of data if DATABASE has been
installed on a network server and all users run the same
EXE-file: Create the database New-Data as indicated above for a single user.
These files (New-Data.elm and New-Data.txt)
are then copied to the directory where Database.exe is located,
and they are renamed to Hydr-New.elm and
Hydr-New.txt.
The data are then automatically used by all users.
- If an ini-file (Database.ini)
is found in the installation directory
(that is, where Database.exe is found) then this file
is always used to read dabase names and other options. If this file is
read-only, then the user’s ini-file
(in %APPDATA%) then supplies only the default
directory. See also
Installing and Uninstalling.