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Data Conversion

The data conversion services that you receive from us encompass the entire data conversion process, including data and business analysis, conversion, DTD development, database design and integration and data output services.

We undertake document conversion processes of different kinds and also convert PDFs, word processors, typesetters, along with conversion of document and paper formats into XML, HTML-SGML and other structured format. Book conversion, catalog conversion and CAD conversion process are a few of the other services we offer. We offer to convert your valuable data into excel worksheets, mainframe data, paradox, FoxPro, Dbase or text files.

Offshore data entry services offers advanced data conversion services that helps converts and organizes your content to create electronic documents, populate data bases, publish on the web, and get it ready for tomorrow’s technology. Our services help you to refine your document conversion strategy, identify document redundancy, extract metadata, and transform legacy and future documents for your real needs of the present and the future.

For all the cutting edge outsourcing data conversion services, look no further than offshore data entry. Utilize the potential of our avant-garde data conversion techniques and save your valuable time and money.

Background

At the second workshop in May 2000, we reported on the quality of the All Fields Postcode Directory (AFPD). Our focus was its use in constructing look up tables between pairs of geographies. In summary, we recommended that ESRC pursue improvements to the AFPD, since despite variable completeness and quality, it provides tools of data conversion of great potential to census analysts in the academic sector and beyond.

Dissemination

Since that time, we have discussed our work with other users of the AFPD, and with ONS staff preparing the government’s Neighbourhood Statistics Service, who are seeking similar geographical tools. With the Programme Director, we are negotiating with ONS to make the project’s Internet tools available outside the academic sector.

Progress

During the summer, the project’s Internet site has been developed to provide a tool for data conversion. It is a pilot site as yet, in that the formatting of the site and the files it produces are undergoing a thorough review. Once robust, the intention is to transfer the site to MIMAS, and this is also the subject of active negotiation.

Content of this report

The main part of this report consists of the draft description of the data conversion tools available, with details of the methodology by which they have been constructed. Readers are welcome to use the website in its current form, using these notes as a guide. Comments to improve the clarity of the documentation, or indeed to suggest amendments to the methodology, would be very welcome.

Media

The media this article discusses tape is the most obvious issue. If you get a DLT tape, you will need a DLT drive to read it. You will also need the right model DLT drive; there are 15 different DLT drives and they all write different physical recording formats.

Furthermore, the type of tape does not always indicate the physical recording format, and therefore the drive you need. A DLT IV tape can be used in DLT 4000, DLT 7000, DLT 8000, DLT-1, and VS-80 drives, and they write to tape differently. You simply can't tell by the type of tape what physical format has been recorded on it.

Tape Format

Tape format, also described as the file structure on the tape, is the most misunderstood conversion issue. There are hundreds of programs used to write files to tape, and each one does it differently. In nearly all cases the tape program creates a data structure on the tape -- sort of like a container -- to aid in storing and retrieving the files, then places your files within that structure. In order to retrieve your files you will need to extract them from that structure using the same program, and sometimes even the same version, to read the tape as was used to write the tape. There is more information about tape formats, and examples, in our Intermediate Data Conversion Tutorial.

File Type and File Content

The File Type we are discussing here is the file type on disk, before it is written to tape or after it is restored from tape.

The File Type and File Content are closely related, with overlapping issues and interactions. What "File Type" and "File Content" refer to depends on both the operating system and the kind of file. Furthermore, the issues are different for mainframes and PCs, and for different kinds of files, so it's difficult to make global statements about either. What follows is a simple overview. Our Intermediate Data Conversion Tutorial contains a more complete description.

File type

File type refers to how the file is stored on disk. In the case of mainframe computers, the "how" is handled by the operating system, while on Windows, UNIX, and Macintosh computers it's handled by the application program. So "file type" has very different meanings and implications on mainframes than on PCs.

Regardless of where it is handled, it refers to the kind of file. Under an operating system that uses structured files, such as a mainframe, "file type" describes, for example, an indexed or sequential file, with fixed-length or variable-length records, and likely other file parameters such as the record length or type of indexing. Under operating systems that don't use structured files, such as UNIX or Windows, "file type" commonly refers to the application that created the file, such as "a Microsoft Access file", or to some common file type used by many applications, such as a comma-delimited file. This is discussed in much greater detail in our Intermediate Data Conversion Tutorial.

File content

File content refers to what is stored in the file, and what is stored in the file depends on what the file is text, word processing, database, spreadsheet, binary data, object file, executable, etc.

So File Content encompasses many concepts, and takes on different meanings for different types of files. For database files it may mean character fields versus binary fields, EBCDIC versus ASCII, etc. It may also include issues such as redefined fields or redefined records multiple record types in one file. When used to describe a data conversion, file content generally does not refer to the specific data in individual fields or records in the file, such as John Smith or Jane Doe, but to the method or data type used to store that data. File Content may also be dictated by the application. For example, the content of an Access file is controlled by Access and the layout you specify when you create the file.
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1 comment:

  1. Data Entry outsourcing services help you maintain organized records in your office which makes the retrieval of information and updates easier.

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