L2TP: Layer Two Tunneling Protocol, as defined in [RFC2661].
language code identifier (LCID): A 32-bit number that identifies the user interface human language dialect or variation that is supported by an application or a client computer.
LDAP: (1) See Lightweight Directory Access Protocol (LDAP).
LDAP Data Interchange Format (LDIF): A standard that defines how to import and export directory data between directory servers that use the Lightweight Directory Access Protocol (LDAP), as described in [RFC2849].
LDAP Distinguished Name: A string representation of a distinguished name (DN) (4) used to access an object on a directory server via Lightweight Directory Access Protocol (LDAP).
Lempel-Ziv Extended (LZX): An LZ77-based compression engine, as described in [UASDC], that is a universal lossless data compression algorithm. It performs no analysis on the data.
Lempel-Ziv Extended Delta (LZXD): A derivative of the Lempel-Ziv Extended (LZX) format with some modifications to facilitate efficient delta compression. Delta compression is a technique in which one set of data can be compressed within the context of a reference set of data that is supplied both to the compressor and decompressor. Delta compression is commonly used to encode updates to similar existing data sets so that the size of compressed data can be significantly reduced relative to ordinary non-delta compression techniques. Expanding a delta-compressed set of data requires that the exact same reference data be provided during decompression.
(2) A storage device that contains one or more tape drives, a number of slots to hold tape cartridges, and an automated method for loading tapes.
license: (1) A data structure that contains, but is not limited to, policies and an encrypted content key. WMDRM: Network Devices Protocol has four types of licenses: standard licenses, root licenses, base licenses, and leaf licenses.
(2) An XrML1.2 document that describes usage policy for protected content.
Lightweight Directory Access Protocol (LDAP): The primary access protocol for Active Directory. Lightweight Directory Access Protocol (LDAP) is an industry-standard protocol, established by the Internet Engineering Task Force (IETF), which allows users to query and update information in a directory service (DS), as described in [MS-ADTS].
line-of-business (LOB) system: A software system that is used to store business data and can also contain business rules and business logic (2) that support business processes.
linked object: (1) An object that is inserted into a document and continues to exist in a separate source file. If the object in the source file changes, the object in the document is updated automatically to reflect those changes.
(2) Application data that is referenced by documents from other applications.
little-endian: Multiple-byte values that are byte-ordered with the least significant byte stored in the memory location with the lowest address.
LobSystem: A type of MetadataObject that represents a specific version of a line-of business (LOB) system. An LOB system can be a database or a web service.
local replica: A copy of the data in a mailbox that exists on the client.
locale: (1) A collection of rules and data that are specific to a language and a geographical area. A locale can include information about sorting rules, date and time formatting, numeric and monetary conventions, and character classification.
(2) An identifier, as specified in [MS-LCID], that specifies preferences related to language. These preferences indicate how dates and times are to be formatted, how items are to be sorted alphabetically, how strings are to be compared, and so on.
logical unit (LU): An addressable network element in the Systems Network Architecture that serves as an access point to the network for programs and users, allowing them to access resources and communicate with other programs and users. For more information on logical units, see [SNA].
long ID (LID): A 32-bit quantity that, in combination with a GUID, defines a named property.
lowest-cost server: A server whose communication cost to access is the lowest in a list of servers.
LU Type 6.2 (LU 6.2): A type of logical unit designed to provide support for two or more distributed application programs cooperating to carry out some work. All communication provided by LU 6.2 is program-to-program. For more information, see [LU62Peer].