MTDATA – Phase Diagram Software from the National Physical Laboratory







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This command is used to obtain, on the screen, a list of the databases active during the current MTDATA session along with a short status report on each. This includes the title of each database, its size and information on the level of protection to which it is subject.

The following is typical of the output which might be expected:

M T D A T A   D A T A B A S E   S T A T I S T I C S

dump            11      123         50            6
sgtesub        178     3166       2250           77          PTC
SGSUB|SGTE Substance Database 1990(A). CxHy for x > 3 excluded
mydata          33     1104        324           11           T
Data entered on 30/2/92. Modified 1/4/93.

This table shows that the user has three databases active namely dump, sgtesub and mydata. The sgtesub and mydata databases have been given titles.

The columns labelled INDEX and DATA simply indicate the number of INDEX and DATA records used for each database respectively. The INDEX SATN (index saturation) column gives an idea of how full the indexing structure of each database is. This information is not of great importance to most MTDATA users. The SUBSTANCE column records the overall number of times data for individual substances have been loaded into the database or the overall number of data loading events. Even when the data for an existing substance are overwritten the SUBSTANCE count increases by one. The SUBSTANCE column does NOT record the overall number of different substances in the database. That information is available at the end of a database listing (see LIST_DATA).

The letters P T and C in the PROTECTION column are used respectively to show whether a database is Password protected, has a Title or is Captive. A captive database can only be used with a correctly authorised version of MTDATA and cannot automatically be used on a different machine. A vertical line appears in the title of a captive database.
Note that the STATISTICS command takes no parameters and does not need to be followed by an exclamation mark.




stat        (note the absence of !)



Updated 23 June 2010