Inventory might be one of a company's most valuable assets and systems to manage it provide the foundation to meet customer demand. Each inventory system falls within a specific scope and has certain limitations that management must understand in order to choose the best system for the company. Inventory Systems Inventory systems provide a basis for recording sales, purchases. The two primary inventory systems are the periodic system and the perpetual system.
Dedicated file DF Elementary file EF The logical organization of data in a card consists of following structural hierachy of dedicated files: The DF at the root is called the master file MF. The MF is mandatory. The other DFs are optional.
The following two types of EFs are defined: Figure 1 illustrates an example of the logical file organization in a card. Referencing by file identifier - Any file may be referenced by a file identifier coded on 2 bytes.
If the MF referenced by a file identifier, '3F00' shall be used reserved value. The value 'FFFF' is reserved for future use. The value '3FFF' is reserved see referencing by path. In order to select unambiguously any file by its identifier, all EFs and DFs immediately under a given DF shall have different file identifiers.
Referencing by path - Any file may be referenced by a path concatentation of file identifiers. The path begins with the identifier of the MF or of the current DF and ends with the identifier of the file itself. Between those two identifiers, the path consists of the Scope and delimitation of record system of the successive parent DFs if any.
The order of the file identifiers is always in the direction parent to child. If the identifier of the current DF is not known, the value '3FFF' reserved value can be used at the beginning of the path.
The path allows an unambiguous selection af any file from the MF or from the current DF. Referencing by short EF identifier - Any EF may be referenced by a short EF identifier coded on 5 bits valued in the range from 1 to The value '0' used as a short EF identifier references the currently selected EF.
Short EF identifiers connot be used in a path or as a file identifier e. In order to select unambiguously by DF name e. The following structures of EFs are defined: Transparent structure - The EF is seen at the interface as a sequence of data units.
Record structure - The EF is seen at the interface as a sequence of individually identifiable records. The following attributes are defined for EFs structured in records: Size of the records: The card shall support at least one of the following four methods for structuring EFs: Linear EF with record of fixed size.
Linear file with records of variable size. Cyclic EF with records of fixed size.
Figure 2 shows those for EF structures. Data is considered to be stored in a single continuous sequence of records within an EF of record structure or of data units within an EF of transparent structure. Reference to a record or to a data unit outside an EF is an error.
Data referencing method, record numbering method and data unit size are EF-dependent features. When the card provides indications in several places, the indication valid for a given EF is the closest one to that EF within the path from the MF to that EF.
Record identifiers and record numbers are unsigned 8-bit integers with values in the range from '01' to 'FE'. The value '00' is reserved for special purposes. Referencing by record identifier shall induce the management of a record pointer. Referencing by record number shall not affect the record pointer.
Referencing by record identifier - Each record identifier is provided by an application. Within an EF of record structure, records may have the same record identifier, in which case data contained in the records may be used for discriminating between them.
Each time a reference is made with a record identifier, an indication shall specify the logical position of the target record the first or last occurrence, the next or previous occurrence relative to the record pointer: Within each EF of linear structure, the logical positions shall be sequentially assigned when writing or appending i.A.
Introduction. Contents Index End. In their discourses on government, Plato and Aristotle discussed all those problems which were important to an Attic citizen if he were to understand and order his leslutinsduphoenix.com encyclopædic approach was also used in theories of government that were developed in the Middle Ages (Rehm L/).
Press the button to proceed. Preface. Chapter 1 - Introduction. Background The present case for wood gasifiers Overview of the contents of this publication. Scope And Delimitation Of Record System. employees of money lending companies today.
From manual to automated system, is one way of minimizing the problems of having data loss, miscalculation, and secured record keeping of the debtors. The proposed system will have a solution for the problems.
1. If bit8=1 in P1, then bit are set to 0. bit of P1 are a short EF (Elementary File) identifier and P2 is the offset of the first byte to be read in date units from the beginning of the file.