On October 27, 2020, ICE released a revised version of the PRR, which updated the definition of and procedures surrounding severe psychiatric illness in ICE’s identification of aliens at higher risk of severe illness from COVID-19; adjusted ICE procedures in notifying the detainee and his or her legal counsel within 12 hours that the detainee falls within the populations identified as potentially being at higher risk of severe illness from COVID-19 and/or subclasses certified in Fraihat v. ICE; added a requirement for non-dedicated ICE detention facilities to evaluate new admissions within five days of entering custody to determine if the detainee falls within the population identified as potentially at higher risk for serious illness from COVID-19; added a section on ICE procedures for handling vulnerable populations at high risk, to include performance standards for screening, testing and custody determinations, to include requiring all new arrivals into ICE detention be tested for COVID-19 within 12 hours of arrival (collection timeframe may extend to 24 hours if facility collection logistics require additional time); included updated procedures for the use of safe cleaning products, as well as reporting requirements and ICE investigations if adverse reactions to cleaning products are experienced by detainees; amended detainee transfers by discontinuing the transfer of ICE detainees except in certain circumstances, with transfers required to clear quarantine protocols and ICE Health Services Corps, and transfers for any other reasons requiring pre-approval by the local ERO Field Office Director; highlighted that extended lockdowns must not be used as a means of COVID-19 prevention practice; and established that medical isolation is operationally distinct from administrative or disciplinary segregation, or any punitive form of housing.

  1. Prr S1
  2. Prrt Therapy
  • The Pennsylvania Railroad (PRR) T1 Steam Locomotive Trust is a non-profit organization that believes in thinking differently about preservation. Through hard work, dedicated volunteers and the financial support of many generous donors from around the globe, the T1 Trust is constructing PRR T1 5550.
  • When a laser is running in pulsed mode, the number of pulses per second or frequency of pulses is known as the pulse repetition rate (PRR). The term PRR and pulse frequency are commonly used. In welding this tends to be in the 10’s of Hz, in fine cutting in the 100-1000’s of Hz, and in marking or micro machining in the 10,000’s of Hz.
  • A person who actually killed, intended to kill, or attempted to kill the victim and who is convicted under s. 782.04 of a capital felony, or an offense that was reclassified as a capital felony, which was committed before the person attained 18 years of age shall be punished by a term of imprisonment for life if, after a sentencing hearing conducted by the court in accordance with s.

Previous Versions

On September 4, 2020, ICE released a revised version of the PRR, a dynamic document that was developed in consultation with the CDC and is updated as new information becomes available and best practices emerge. This version of the PRR updates the list of COVID-19 symptoms recognized by the CDC; provides additional guidance on protocols for asymptomatic staff who have been identified as close contacts of a confirmed COVID-19 case; clarifies that whenever possible, ICE will limit transfers of both ICE detainees and non-ICE detained populations to and from other jurisdictions and facilities unless necessary for medical evaluation, medical isolation/quarantine, clinical care, extenuating security concerns, to facilitate release or removal, or to prevent overcrowding; updates isolation protocols for COVID-19 cases to incorporate the latest CDC guidance on discontinuing transmission-based precautions using a symptom-based or time-based strategy rather than a testing-based strategy; and provides additional information on testing for asymptomatic individuals with known or suspected recent exposure.

On July 28, 2020, ICE released a newly revised version of the PRR, which identifies additional populations potentially at higher risk for serious illness from COVID-19; provides updated guidance on personal protective equipment (PPE); updated guidance on hygiene practices; offers additional guidance when transporting a detainee with confirmed or suspected cases of COVID-19; includes direct reference to CDC guidance for individuals in medical isolation in detention facilities; and includes an updated testing section based on recently released CDC guidance.

Free download motivational videos inspirational songs. The Q2 locomotive was 78% more powerful than the locomotives that PRR had in service at the time, and the company claimed the Q2 could pull 125 freight cars at a speed of 50 mph (80 km/h). These were an improved version of the previous Q1 class, which was a 4-6. Unit # Notes Model Serial # Pictures: PRR 8503: PRR Class ES-15M; 1952, became PC #5853: GP7 16758: 4: 192221: PRR 8504: PRR Class ES-15M.


On June 22, 2020, ICE ERO released a revised version of the PRR, which expanded the list of COVID-19 symptoms; identified additional vulnerable populations potentially at higher risk for serious illness from COVID-19; provided that if single isolation rooms are unavailable, individuals with confirmed COVID-19 should be isolated together as a cohort separate from other detainees, including those with pending test results and that suspected or confirmed COVID-19 cases maintain separation of groups by common criteria; and added facility compliance measures and updated visitation protocols.

On April 10, 2020, ICE Enforcement and Removal Operations (ERO) released the COVID-19 Pandemic Response Requirements (PRR), a guidance document developed in consultation with the Centers for Disease Control and Prevention (CDC) that builds upon previously issued guidance. Specifically, the PRR sets forth specific mandatory requirements expected to be adopted by all detention facilities housing ICE detainees, as well as best practices for such facilities, to ensure that detainees are appropriately housed and that available mitigation measures are implemented during this unprecedented public health crisis.

The Production Rule Representation (PRR) fulfills a number of requirements related to business rules, software systems, OMG standards, and other rule standards.- It provides a standard production rule representation that is compatible with rule engine vendors? definitions of production rules. It can therefore be used for interchange of business rules amongst rule modeling tools (and other tools that support rule modeling as a function of some other task).- It provides a standard production rule representation that is readily mappable to business rules, as defined by business rule management tool vendors.- It provides a standard production rule definition that supports and encourages system vendors to support production rule execution.- It provides an OMG MDA PIM model with a high probability of support at the PSM level from the contributing rule engine vendors and others, and can be included to add production rule capabilities to other OMG metamodels.- It provides examples of how the OMG UML can be used to support production rules in a standardized and useful way.- It provides a standard production rule representation that can be used as the basis for other efforts such as the W3C Rule Interchange Format and a production rule version of RuleML.

Production Rule Representation


Document Status:

formal ⓘ

Publication Date:
December 2009

Table Of Contents

  • Specification Documents
  • History

Companies that have contributed to the development of this Specification

  • Copyright © 2007 FICO
  • Copyright © 2007 ILOG S.A.
  • Copyright © 2009 Object Management Group
  • Copyright © 2007 TIBCO Software, Inc.

Issues associated with this specification

Specification Documents


Normative Documents

DescriptionFormatURLOMG File ID

Normative Machine Readable Documents

DescriptionFormatURLOMG File ID
Updated PRR FTF Report - updated MOF zip fileArchivePRR/20090301
Updated PRR FTF Report - updated MagicDraw Model fileArchivePRR/20090302


Formal Versions

Prr S1

VersionAdoption DateURL
1.0 December 2009 https://www.omg.org/spec/PRR/1.0


Prrt Therapy

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