Sequence Diagram Control Object

Posted : admin On 16.08.2021

Activity Diagrams

In UML, an activity diagram is used to display the sequence of activities. Activity diagrams show the workflow from a start point to the finish point detailing the many decision paths that exist in the progression of events contained in the activity. They may be used to detail situations where parallel processing may occur in the execution of some activities. Activity diagrams are useful for business modelling where they are used for detailing the processes involved in business activities.
An Example of an activity diagram is shown below.

  1. A sequence diagram is structured in such a way that it represents a timeline which begins at the top and descends gradually to mark the sequence of interactions. Each object has a column and the messages exchanged between them are represented by arrows. A Quick Overview of the Various Parts of a Sequence Diagram. Lifeline Notation.
  2. UML Sequence Diagrams are interaction diagrams that detail how operations are carried out. They capture the interaction between objects in the context of a collaboration. Sequence Diagrams are time focus and they show the order of the interaction visually by using the vertical axis of the diagram to represent time what messages are sent and when.

Activity diagram: Shows sequence and conditions for coordinating lower-level behaviors, rather than which classifiers own those behaviors. These are commonly called control flow and object flow models. Activity, partition, action, object, control, activity edge. State machine diagram. Sequence diagrams can illustrate a succession of interactions between classes or object instances over time. Sequence diagrams are often used to illustrate the processing described in use case scenarios. In practice, sequence diagrams are derived from use case analysis and are used in systems design to derive the interactions, relationships.

The following sections describe the elements that constitute an activity diagram.


An activity is the specification of a parameterized sequence of behaviour. An activity is shown as a round-cornered rectangle enclosing all the actions, control flows and other elements that make up the activity.


An action represents a single step within an activity. Actions are denoted by round-cornered rectangles.

Action Constraints

Constraints can be attached to an action. The following diagram shows an action with local pre- and post-conditions.

Control Flow

Rohs usb rs232 driver download. A control flow shows the flow of control from one action to the next. Its notation is a line with an arrowhead.

Initial Node

An initial or start node is depicted by a large black spot, as shown below.

Final Node

There are two types of final node: activity and flow final nodes. The activity final node is depicted as a circle with a dot inside.

The flow final node is depicted as a circle with a cross inside.

The difference between the two node types is that the flow final node denotes the end of a single control flow; the activity final node denotes the end of all control flows within the activity.

Objects and Object Flows

An object flow is a path along which objects or data can pass. An object is shown as a rectangle.

An object flow is shown as a connector with an arrowhead denoting the direction the object is being passed.

An object flow must have an object on at least one of its ends. A shorthand notation for the above diagram would be to use input and output pins.

A data store is shown as an object with the «datastore» keyword.

Decision and Merge Nodes

Decision nodes and merge nodes have the same notation: a diamond shape. They can both be named. The control flows coming away from a decision node will have guard conditions which will allow control to flow if the guard condition is met. The following diagram shows use of a decision node and a merge node.

Fork and Join Nodes

Forks and joins have the same notation: either a horizontal or vertical bar (the orientation is dependent on whether the control flow is running left to right or top to bottom). They indicate the start and end of concurrent threads of control. The following diagram shows an example of their use.

A join is different from a merge in that the join synchronizes two inflows and produces a single outflow. The outflow from a join cannot execute until all inflows have been received. A merge passes any control flows straight through it. If two or more inflows are received by a merge symbol, the action pointed to by its outflow is executed two or more times.

Expansion Region

An expansion region is a structured activity region that executes multiple times. Input and output expansion nodes are drawn as a group of three boxes representing a multiple selection of items. The keyword 'iterative', 'parallel' or 'stream' is shown in the top left corner of the region.

Exception Handlers

Exception Handlers can be modelled on activity diagrams as in the example below.

Interruptible Activity Region

An interruptible activity region surrounds a group of actions that can be interrupted. In the very simple example below, the 'Process Order' action will execute until completion, when it will pass control to the 'Close Order' action, unless a 'Cancel Request' interrupt is received, which will pass control to the 'Cancel Order' action.


An activity partition is shown as either a horizontal or vertical swimlane. In the following diagram, the partitions are used to separate actions within an activity into those performed by the accounting department and those performed by the customer.

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Related to sequence: Arithmetic sequence


(sē′kwəns, -kwĕns′)n.
1. A following of one thing after another; succession.
3. A related or continuous series. See Synonyms at series.
4. Games Three or more playing cards in consecutive order and usually the same suit; a run.
5. A series of related shots that constitute a complete unit of action in a movie.
6. Music A melodic or harmonic pattern successively repeated at different pitches with or without a key change.
7. Roman Catholic Church A hymn sung between the gradual and the Gospel.
8. Mathematics An ordered set of quantities, as x, 2x2, 3x3, 4x4.
9. Biochemistry The order of constituents in a polymer, especially the order of nucleotides in a nucleic acid or of the amino acids in a protein.·quenced, se·quenc·ing, se·quenc·es
2. To determine the order of constituents in (a polymer, such as a nucleic acid or protein molecule).
[Middle English, a type of hymn, from Old French, from Medieval Latin sequentia, hymn, that which follows (from its following the alleluia), from Late Latin, from Latin sequēns, sequent-, present participle of sequī, to follow; see sekw- in Indo-European roots.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(ˈsiːkwəns) n
1. an arrangement of two or more things in a successive order
2. the successive order of two or more things: chronological sequence.
3. a sequentially ordered set of related things or ideas
4. an action or event that follows another or others
5. (Card Games) cards a set of three or more consecutive cards, usually of the same suit
6. (Bridge) bridge a set of two or more consecutive cards
7. (Music, other) music an arrangement of notes or chords repeated several times at different pitches
8. (Mathematics) maths
a. an ordered set of numbers or other mathematical entities in one-to-one correspondence with the integers 1 to n
b. an ordered infinite set of mathematical entities in one-to-one correspondence with the natural numbers
9. (Film) a section of a film constituting a single continuous uninterrupted episode
10. (Biochemistry) biochem the unique order of amino acids in the polypeptide chain of a protein or of nucleotides in the polynucleotide chain of DNA or RNA
11. (Roman Catholic Church) RC Church another word for prose4
vb (tr)
13. (Biochemistry) biochem to determine the order of the units comprising (a protein, nucleic acid, genome, etc)
[C14: from Medieval Latin sequentia that which follows, from Latin sequī to follow]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈsi kwəns)
n., v. -quenced, -quenc•ing.n.
1. the following of one thing after another; succession.
3. a continuous connected series: a sonnet sequence.
5. a melodic or harmonic pattern repeated three or more times at different pitches with or without modulation.
6. (often cap.) a hymn sometimes sung after the Gradual and before the Gospel in Masses for special occasions.
7. a series of related scenes or shots that make up one episode of a film narrative.
8. a series of three or more cards following one another in order of value, esp. of the same suit.
9. Genetics, Biochem. the linear order of monomers in a polymer, as nucleotides in DNA or amino acids in a protein.
11. Genetics, Biochem. to determine the order of (chemical units in a polymer chain), esp. nucleotides in DNA or RNA or amino acids in a protein.
[1350–1400; Middle English < Late Latin sequentia= Latin sequ- (s. of sequī to follow) + -entia-ence]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.


1. Mathematics A set of quantities ordered in the same manner as the positive integers. A sequence can be finite, such as {1, 3, 5, 7, 9}, or it can be infinite, such as {1, 1/2 , 1/3 , 1/4 , .. 1/n }.
2. Chemistry The order of molecules that make up the subunits of a chemical compound, especially the order of nucleotides in a nucleic acid or of the amino acids in a protein.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


  • arithmetic progression - A sequence in which each term is obtained by the addition of a constant number to the preceding term, as 1, 4, 7, 10, 13.
  • initialism, alphabetism, acronym - Initialisms (sometimes called alphabetisms) are formed from the initial letters of a string of words and are pronounced as a sequence of letters, e.g. BYOB, USA, DVD. Acronyms are formed from the initial letters or parts of words in a sequence, but have the distinction of being pronounceable words, e.g. RADAR, SCUBA.
  • solfeggio, gamut - Solfeggio and gamut are words formed on the sequence of musical notes.
  • tier - From French tire, 'order, sequence.'
Farlex Trivia Dictionary. © 2012 Farlex, Inc. All rights reserved.


a continuous or connected series, 1575.
Examples: sequence of causes, 1829; of chambers, 1668; of reflections, 1823; of saints, 1589.
Dictionary of Collective Nouns and Group Terms. Copyright 2008 The Gale Group, Inc. All rights reserved.


Past participle: sequenced
Gerund: sequencing
I sequence
you sequence
he/she/it sequences
we sequence
you sequence
they sequence
I sequenced
you sequenced
he/she/it sequenced
we sequenced
you sequenced
they sequenced
Present Continuous
I am sequencing
you are sequencing
he/she/it is sequencing
we are sequencing
you are sequencing
they are sequencing
Present Perfect
I have sequenced
you have sequenced
he/she/it has sequenced
we have sequenced
you have sequenced
they have sequenced
Past Continuous
I was sequencing
you were sequencing
he/she/it was sequencing
we were sequencing
you were sequencing
they were sequencing
Past Perfect
I had sequenced
you had sequenced
he/she/it had sequenced
we had sequenced
you had sequenced
they had sequenced
I will sequence
you will sequence
he/she/it will sequence
we will sequence
you will sequence
they will sequence
Future Perfect
I will have sequenced
you will have sequenced
he/she/it will have sequenced
we will have sequenced
you will have sequenced
they will have sequenced
Future Continuous
I will be sequencing
you will be sequencing
he/she/it will be sequencing
we will be sequencing
you will be sequencing
they will be sequencing
Present Perfect Continuous
I have been sequencing
you have been sequencing
he/she/it has been sequencing
we have been sequencing
you have been sequencing
they have been sequencing

Simple Sequence Diagram

Future Perfect Continuous
I will have been sequencing
you will have been sequencing
he/she/it will have been sequencing
we will have been sequencing
you will have been sequencing
they will have been sequencing
Past Perfect Continuous
I had been sequencing
you had been sequencing
he/she/it had been sequencing
we had been sequencing
you had been sequencing
they had been sequencing
I would sequence
you would sequence
he/she/it would sequence
we would sequence
you would sequence
they would sequence
Past Conditional
I would have sequenced
you would have sequenced
he/she/it would have sequenced
we would have sequenced
you would have sequenced
they would have sequenced
Collins English Verb Tables © HarperCollins Publishers 2011
Sequence object sql


A single episode in a film which is uninterrupted.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
Noun1.sequence - serial arrangement in which things follow in logical order or a recurrent pattern; 'the sequence of names was alphabetical'; 'he invented a technique to determine the sequence of base pairs in DNA'
cistron, gene, factor - (genetics) a segment of DNA that is involved in producing a polypeptide chain; it can include regions preceding and following the coding DNA as well as introns between the exons; it is considered a unit of heredity; 'genes were formerly called factors'
string - a linear sequence of symbols (characters or words or phrases)
combination - a sequence of numbers or letters that opens a combination lock; 'he forgot the combination to the safe'
combination - a coordinated sequence of chess moves
Fibonacci sequence - a sequence of numbers in which each number equals the sum of the two preceding numbers
series - similar things placed in order or happening one after another; 'they were investigating a series of bank robberies'
codon - a specific sequence of three adjacent nucleotides on a strand of DNA or RNA that specifies the genetic code information for synthesizing a particular amino acid
2.sequence - a following of one thing after another in time; 'the doctor saw a sequence of patients'
chronological sequence, chronological succession, succession, successiveness
temporal arrangement, temporal order - arrangement of events in time
pelting, rain - anything happening rapidly or in quick successive; 'a rain of bullets'; 'a pelting of insults'
rotation - a planned recurrent sequence (of crops or personnel etc.); 'crop rotation makes a balanced demand on the fertility of the soil'; 'the manager had only four starting pitchers in his rotation'
row - a continuous chronological succession without an interruption; 'they won the championship three years in a row'
run - an unbroken chronological sequence; 'the play had a long run on Broadway'; 'the team enjoyed a brief run of victories'
3.sequence - film consisting of a succession of related shots that develop a given subject in a movie
photographic film, film - photographic material consisting of a base of celluloid covered with a photographic emulsion; used to make negatives or transparencies
motion picture, motion-picture show, movie, moving picture, moving-picture show, pic, film, picture show, flick, picture - a form of entertainment that enacts a story by sound and a sequence of images giving the illusion of continuous movement; 'they went to a movie every Saturday night'; 'the film was shot on location'
4.sequence - the action of following in order; 'he played the trumps in sequence'
chess opening, opening - a recognized sequence of moves at the beginning of a game of chess; 'he memorized all the important chess openings'
ordering, order - the act of putting things in a sequential arrangement; 'there were mistakes in the ordering of items on the list'
alternation - successive change from one thing or state to another and back again; 'a trill is a rapid alternation between the two notes'
5.sequence - several repetitions of a melodic phrase in different keys
repeat, repetition - an event that repeats; 'the events today were a repeat of yesterday's'
Verb1.sequence - arrange in a sequence
grade, rate, rank, place, range, order - assign a rank or rating to; 'how would you rank these students?'; 'The restaurant is rated highly in the food guide'
2.sequence - determine the order of constituents in; 'They sequenced the human genome'
ascertain, determine, find out, find - establish after a calculation, investigation, experiment, survey, or study; 'find the product of two numbers'; 'The physicist who found the elusive particle won the Nobel Prize'
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


1.succession, course, series, order, chain, cycle, arrangement, procession, progressionthe sequence of events that led to the murder
2.order, structure, arrangement, ordering, placement, layout, progressionThe chronological sequence gives the book an element of structure.
3.part, scene, section, episode, extract, excerpt, clipthe best sequence in the film
Collins Thesaurus of the English Language – Complete and Unabridged 2nd Edition. 2002 © HarperCollins Publishers 1995, 2002


noun1. Something brought about by a cause:
aftermath, consequence, corollary, effect, end product, event, fruit, harvest, issue, outcome, precipitate, ramification, result, resultant, sequel, sequent, upshot.
2. A way in which things follow each other in space or time:
3. A way or condition of being arranged:
arrangement, categorization, classification, deployment, disposal, disposition, distribution, formation, grouping, layout, lineup, order, organization, placement.
4. A number of things placed or occurring one after the other:
chain, consecution, course, order, procession, progression, round, run, series, string, succession, suite, train.
The American Heritage® Roget's Thesaurus. Copyright © 2013, 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


1. (= order) → ordenm
in sequenceen orden
in historical sequence
logical sequencesecuenciaflógica
to arrange things in sequence
2. (= series) → serief
a sequence of eventsuna serie de acontecimientos
3. (Cine) → secuenciaf
the best sequence in the filmla mejorsecuenciade lapelícula
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005


(= order) → ordrem
in the proper sequence, in the correct sequence → dans le bon ordre
Things have to be done in the proper sequence → Les choses doivent être faitesdans le bon ordre.
in sequence → dans l'ordre
(= series) → sérief
a sequence of six photographs → une série de six photographies
a sequence of events → une succession d'événements
(= part of film) → séquencef
the opening sequence → la séquence d'ouverture
the famous opening sequence of the film → la célèbreséquence d'ouverture du film
Collins English/French Electronic Resource. © HarperCollins Publishers 2005


(= order)Folgef, → Reihenfolgef; sequence of tenses/wordsZeiten-/Wortfolgef; in sequenceder Reihe nach; to do something in logical sequenceetw in der logischrichtigenReihenfolgetun
(= things following)Reihef, → Folgef; (Mus, Cards, Eccl) → Sequenzf; (Math) → Reihef
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007


a. (order) → successionef, ordinem
in sequence → in ordine, di seguito
sequence of tenses (Gram) → concordanza dei tempi
b. (series) → serief inv (Mus, Cards) (film sequence) → sequenza
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995


(ˈsiːkwəns) noun
a series of events etc following one another in a particular order. He described the sequence of events leading to his dismissal from the firm; a sequence of numbers; a dance sequence. volgorde تَسَلْسُل، تَتابُع поредица sequência sled, řada die Reihenfolge rækkefølge; række; sekvens; -sekvens σειρά, αλληλουχίαserie, secuencia sari, järjend زنجيره tapahtumasarja successionסדרה अनुक्रम slijed, niz sor(ozat) rentetan peristiwa röð, syrpa, sería sequenza, successione 結果 연속 seka secība urutan reeksrekkefølge, sekvens następstwo, ciąg نتيجه، لړ، سلسله: زمانې: روڼ، زماني تسلسل، پرله پسې، ادامه بهتر sequência succesiune последовательность postupnosť, poradie, sled zaporedje niz ordningsföljd, [händelse]förlopp, sekvens เหตุการณ์ต่อเนื่องกันมา dizi, zincir 順序 послідовність; ряд سلسلہ، تسلسل chuỗi nhiều sự kiện, con số.. 顺序,次序
Kernerman English Multilingual Dictionary © 2006-2013 K Dictionaries Ltd.

Sequence Diagram Tutorial


تَسَلْسُل pořadí sekvensReiheαλληλουχίαsecuencia järjestyssuccession slijedsequenza 順序 차례volgordesekvenssekwencjasequênciaпоследовательность sekvens ลำดับdizi chuỗi顺序
Multilingual Translator © HarperCollins Publishers 2009


English-Spanish Medical Dictionary © Farlex 2012

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