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Last Updated: May 18, 2026
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MarkLogic Server
Version 12.0
Documentation

OAuth server

object

MarkLogic. A component of interest in MarkLogic Server, such as a cluster, host, App Server, or database.

Object

Semantics. An RDF resource, which in turn may be the Subject in a triple. An object may be a typed literal. See also Predicate, Resource Description Framework Schema (RDFS), and RDF Datatypes in Understand Semantic Graphs.

Object Relational Mapping (ORM)

Database. A technique for converting data between incompatible type systems in object-oriented languages, creating a "virtual object database" that can be used from within the language.

ODBC Server

MarkLogic. A host that is an instance of MarkLogic Server designed for connecting to an ODBC content source and supporting SQL queries. See host.

offline partition or forest

MarkLogic. A partition or forest that is not available for queries, but is tracked by the cluster. The benefit of taking data offline is to spare the RAM, CPU, and network resources for the online data.

online partition

MarkLogic. A partition or forest that is available for queries and updates

ontology

Semantics. An ontology provides a semantic model of (a portion of) the world. An ontology is generally expressed as triples (like “a Henley is a shirt”) in an ontology language such as Resource Description Framework Schema (RDFS) or Web Ontology Language (OWL). The triples that make up an ontology are ontology triples. Ontologies can include vocabularies, a controlled set of terms used to define concepts and relationships.

ontology triples

Semantics. Triples that make up an ontology are ontology triples. See asserted triples and vocabularies.

operational data hub

MarkLogic. An operational data hub pattern is a particular way of building a data hub, which allows for faster, more agile data integration into a single Hub. Because it is operational, an operational data hub allows real-time, interactive access to data. This means that shared services can be run off the data hub in addition to analytic reports.

Ops Director

Ops Director provides you with system monitoring, management, analysis, and support capabilities, as well as license auditing and role-based access control (RBAC) management. The Ops Director web-based interface offers graphical and tabular data representation intended to highlight irregular performance or alerts on a given cluster, host, database, or application server.

Ops Director Resources

The following resources are created on the host where your Ops Director application runs.

Table 1. Ops Director Resource Definitions

Resource Type	Resource Name and Function
Certificate Authority	The Certificate Authority (`MarkLogic Ops Director` in this example) is used to generate the secure credentials required for the Ops Director application and Managed Clusters to securely communicate.
Certificate Templates	`OpsDirector-SSL-Template` for SSL on the Application Cluster. `OpsDirector Template` for SSL, if also configured as a Managed Cluster.
Roles	`opsdir-guest` role is used for a default user of the Ops Director application. `opsdir-user` role is required for any user to be able to access the Ops Director application. `opsdir-license-admin` role grants a user rights to manage licenses for the Ops Director application. `opsdir-admin` role grants a user administrative rights to the Ops Director application.
Execute Privileges	`opsdir-admin` protects administrative functions. `opsdir-license-admin` is required to access license information. `opsdir-user` is required to access the browser application.
Database and Forests	The `OpsDirector` database and forests hold the Ops Director configuration data.
App Servers	`OpsDirectorApplication` (port 8008) provides the Ops Director browser application and consumes the data stored in the `OpsDirector` database. `OpsDirectorSystem` (port 8009) receives data transmitted from Managed Clusters and stores it in the `OpsDirector` database.
External Security Configuration	`OpsDirector-External-Security` for authentication of clients. `OpsDirectorSystem` for secure communication with `OpsDirectorSystem` server.
Secure Credentials	`OpsDirector-Credential` to sign `OpsDirector-SSL-Template`. `MarkLogic-OpsDirector` for accessing `OpsDirectorSystem` server.

Optic API

The MarkLogic Optic API makes it possible to perform relational operations on indexed values and documents. The Optic API is not a single API, but rather a set of APIs exposed within the XQuery, JavaScript, and Java languages.

ordering clause

MarkLogic. A part of an ordering specification, as part of the cts:search() function, that deals with a single ordering key

ordering specification

MarkLogic. A way to specify, in a parameter, the ordering of a set of search results from a cts:search() function.

ORM (Object Relational Mapping)

Database. See Object Relational Mapping.

output options

With MarkLogic you can generate output in many different formats, such as: XML, HTML, RSS, PDF, Microsoft Office formats, Adobe InDesign, QuarkXPress, and JSON.

OutputFormat

Hadoop. The abstract superclass, org.apache.hadoop.mapreduce.OutputFormat, of classes that store output key-value pairs during the reduce phase. The Apache Hadoop MapReduce API includes OutputFormat subclasses for using HDFS for output. The MarkLogic Connector for Hadoop API provides OutputFormat subclasses for using a MarkLogic Server database as an output destination.

OWL

Semantics. See Web Ontology Language.

Glossary

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