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  2. PDF - Wikipedia

    en.wikipedia.org/wiki/PDF

    HTML 4.01 Specification since PDF 1.5; HTML 2.0 since 1.2 Forms Data Format (FDF) based on PDF, uses the same syntax and has essentially the same file structure, but is much simpler than PDF since the body of an FDF document consists of only one required object. Forms Data Format is defined in the PDF specification (since PDF 1.2).

  3. PDF/A - Wikipedia

    en.wikipedia.org/wiki/PDF/A

    PDF/A-3 allows embedding of any file format such as XML, CAD and others into PDF/A documents. The use of XML-based XML Forms Architecture (XFA) forms is forbidden in PDF/A. (XFA form data may be preserved in a PDF/A-2 file by moving from XFA key to the Names tree that itself is the value of the XFAResources key of the Names dictionary of the ...

  4. Pulse-code modulation - Wikipedia

    en.wikipedia.org/wiki/Pulse-code_modulation

    Passband modulation. Pulse-code modulation (PCM) is a method used to digitally represent analog signals. It is the standard form of digital audio in computers, compact discs, digital telephony and other digital audio applications. In a PCM stream, the amplitude of the analog signal is sampled at uniform intervals, and each sample is quantized ...

  5. BED (file format) - Wikipedia

    en.wikipedia.org/wiki/BED_(file_format)

    The BED (Browser Extensible Data) format is a text file format used to store genomic regions as coordinates and associated annotations. The data are presented in the form of columns separated by spaces or tabs. This format was developed during the Human Genome Project [1] and then adopted by other sequencing projects.

  6. Resource Description Framework - Wikipedia

    en.wikipedia.org/wiki/Resource_Description_Framework

    Resource Description Framework. The Resource Description Framework (RDF) is a World Wide Web Consortium (W3C) standard originally designed as a data model for metadata. It has come to be used as a general method for description and exchange of graph data. RDF provides a variety of syntax notations and data serialization formats, with Turtle ...

  7. Survey sampling - Wikipedia

    en.wikipedia.org/wiki/Survey_sampling

    A probability-based survey sample is created by constructing a list of the target population, called the sampling frame, a randomized process for selecting units from the sample frame, called a selection procedure, and a method of contacting selected units to enable them to complete the survey, called a data collection method or mode. [10]

  8. AES67 - Wikipedia

    en.wikipedia.org/wiki/AES67

    AES67 also defines audio sample format and sample rate, supported number of channels, as well as IP data packet size and latency/buffering requirements. The standard calls out several protocol options for device discovery but does not require any to be implemented. Session Initiation Protocol is used for unicast connection management. No ...

  9. High-Level Data Link Control - Wikipedia

    en.wikipedia.org/wiki/High-Level_Data_Link_Control

    High-Level Data Link Control (HDLC) is a communication protocol used for transmitting data between devices in telecommunication and networking. Developed by the International Organization for Standardization (ISO), it is defined in the standard ISO/IEC 13239:2002. HDLC ensures reliable data transfer, allowing one device to understand data sent ...