TOWARD A THEORY OF HYPERTEXTUAL DESIGN
 
                                  by
 
                           KATHLEEN BURNETT
             Communication, Information & Library Studies
                          Rutgers University
                      
 
               _Postmodern Culture_ v.3 n.2 (January, 1993)
 
          Copyright (c) 1993 by Kathleen Burnett, all rights
          reserved.  This text may be freely shared among
          individuals, but it may not be republished in any
          medium without express written consent from the author
          and advance notification of the editors.
 
 
 
          While the study of the temporal and spatial
          distanciation of communication is important to the
          concept of the mode of information the heart of the
          matter lies elsewhere.  For the issue of
          communicational efficiency . . . does not raise the
          basic question of the configuration of information
          exchange, or what I call the wrapping of language.
                                               --Poster, 8
 
 
     HYPERTEXT/HYPERMEDIA
 
[1]       What distinguishes hypermedia from other modes of
     information is not that it is computer-driven--after all,
     the browsing and retrieval mechanisms of Vannevar Bush's
     memex were non-electronic--nor that it is interactive, since
     the entire history of oral communication, whether
     electronically mediated or not, might be characterized as
     interactive; nor even that it includes navigational
     apparatus such as links and nodes, which might better be
     thought of as symptoms than causes, or buttresses rather
     than groundwork.  What distinguishes hypermedia is that it
     posits an information structure so dissimilar to any other
     in human experience that it is difficult to describe as a
     structure at all.  It is nonlinear, and therefore may seem
     an alien wrapping of language when compared to the
     historical path written communication has traversed; it is
     explicitly non-sequential, neither hierarchical nor "rooted"
     in its organizational structure, and therefore may appear
     chaotic and entropic.  Yet clearly, human thought processes
     include nonlinear, nonsequential, and interactive
     characteristics which, when acknowledged by traditional
     information structures, are not supported.  In fact, one
     might characterize the history of information transfer as a
     tyranny against such characteristics, that is, a tyranny
     against the rhizome.
[2]       Hypermedia might be understood as one manifestation of
     the struggle against this tyranny.  In current parlance,
     hypermedia is used to describe both applications which make
     use of navigational tools such as links and nodes to form
     "texts" or databases, and the organizational principles of
     such "texts" and databases.  Hypertext is also used to
     denote these same meanings.  When a distinction is drawn
     between the two, it normally focuses on content--"hypertext"
     is used to refer to hyper-structures consisting exclusively
     of written texts, while "hypermedia" denotes similar
     structures built around multiple media.  Others have noted
     the artificiality of such a delineation.  "Text" is also
     used as a synonym for a "written work" or "book" which may
     or may not be limited to alphanumeric characters.  A "text"
     may included charts, graphs, illustrations, photographs, and
     other visual media in its expression of meaning.  Why then
     should a "hypertext"--which has the potential for
     incorporating an even wider range of expressive media
     (sound, animation, etc.)--be limited to alphanumeric
     characters in its expression?
[3]       A more useful differentiation might be drawn along
     structural rather than contextual lines.  Hypertext
     demonstrates "traits that are usually obscured by the
     enforced linearity of paper printing"; it is text--only more
     so--because it participates in a structure that resonates
     asynchronous and nonlinear relationships.  Hypertext is a
     kind of weaving--"text" derives ultimately from the Latin
     %texere%, and thus shares a common root with "textile"--a
     structuring with texture--web, warp, and weave, allowing for
     infinite variation in color, pattern and material; it is the
     loom that structures the "text-ile."  Hypertext is the
     organizational principle of hypermedia.  Hypermedia is the
     medium of expression of a given hypertext structure.  When
     that medium mirrors the singularity of the print medium of
     alphanumeric text, it may be properly called either
     "hypertext" or "hypermedia"; when the medium reflects an
     "intertwingling" (Nelson 31) of what we understand as
     separate "media" in the analog sense of the term, it should
     perhaps be referred to as "hypermedia," but might equally be
     acknowledged as "hypertext."  Neither hypertext nor
     hypermedia is an object, rather the former is a structure,
     and the latter a medium, of information transfer.
 
 
     HISTORICAL CONTEXT
 
[4]       All electronically mediated exchange participates in
     hypertext, though the degree of participation varies
     enormously.  Some electronically mediated exchange is
     "hypertextual" only to the degree that it is virtual--that
     it consists of a series of switches or codes (binary or
     otherwise) which are, in and of themselves, unreadable (and,
     therefore, nontextual), and which contain "pointers" to
     their reconstruction as meaningful exchanges.  The switches
     or codes are "nodes" which are "linked" to a "textual" form
     which, at any given moment may exist only "hypertextually."
     Electronically mediated exchange is therefore
     paradigmatically different from other modes of information
     precisely because it participates in the organizing
     principle of hypertext.
[5]       In _The Mode of Information_, Poster proposes a concept
     which plays on Marx's theory of the mode of production:
          By mode of information I similarly suggest that history
          may be periodized by variations in the structure in
          this case of symbolic exchange, but also that the
          current culture gives a certain fetishistic importance
          to 'information.'  Every age employs forms of symbolic
          exchange which contain internal and external
          structures, means and relations of signification.
          Stages in the mode of information may be tentatively
          designated as follows: face-to-face, orally mediated
          exchange; written exchanges mediated by print; and
          electronically mediated exchange.  (Poster 6)
     Poster's periodization suffers from the coarseness of any
     totalizing metaphor.  While he stresses the trans-historical
     nature of his classification of symbolic exchange, the
     metaphor is only as effective as it is historically
     informed.  As outlined, the third stage--written exchanges
     mediated by print--is not only Western in its bias, but
     fails even within this bias to recognize a rather large
     chunk of history--the manuscript period (circa 4th century
     AD through the mid-fifteenth).  An examination of the
     influence of the mode of information on social structure can
     only be enriched by the recognition of the impact of
     mass-production, in the form of the mechanized reproduction
     of written language, on that structure.  It is impossible,
     however, to understand the full significance of this impact,
     either historically or theoretically, unless its
     contextualization is carefully discerned.  For example,
     contrast these two very different experiences of the
     introduction of the hand-press and its effects on social
     stratification.
[6]       The pre-Reformation Church was able to maintain a
     restrictive social stratification largely because of its
     ability to control the production and comprehension of
     written communication--those who could read and write
     belonged to a privileged elite, while those who could not
     had to be satisfied with acquiring their information from
     those who did.  Through most of the Medieval period and well
     into the Renaissance, the Church was able to control the
     size and membership of the elite through two mechanisms:
     Latin education and limited distribution of written
     communication.  The latter was facilitated by production
     limits imposed by the rigorous and time-consuming process of
     hand-copying, which in turn limited the supply of reading
     material.  Without supply, the demand for education was kept
     to levels that the Church could manipulate and control.  The
     introduction of the hand-press in the mid-fifteenth century
     was accompanied by a precipitous erosion of that control
     which led decisively to the Reformation.  Once reading
     material could be produced in large quantities in a
     relatively short period of time--500 to 1000 copies of an
     average-length manuscript could be produced by a printer
     owning two hand-presses within the space of less than a
     month, as compared to the production of a single copy of a
     manuscript, which could take up to a year--in other words,
     once the non-elite were able to acquire material to read,
     they began to do so.  Printers, recognizing the commercial
     potential of this new market, began to produce material in
     the vulgate, which in turn expedited exponential growth in
     the educated population, since it facilitated the process of
     self-education.  As this population grew, demands for equity
     in education across social classes escalated.  The earliest
     signs of this movement are evident in the growth of the
     popular and self-help literature markets, and the
     introduction of mass communication, across time and
     distance, over which the Church could ultimately exercise
     little effective control (Eisenstein).
[7]       Contrast this experience with that of the introduction
     of a hand-press in colonial Massachusetts in 1660 for the
     express purpose of propagating the gospel among the Indians,
     who had no written language.  The social stratification
     which existed within the tribe prior to the introduction of
     the press was anchored in the individual's ability to
     communicate with the spiritual realm and was maintained
     through oral mediation of the ritual culture.  After the
     introduction of the press, the very foundations of that
     stratification were undermined.  A schism developed between
     those who subscribed to the gospel, and thus to the notion
     of a single god, and those who continued in the old beliefs.
     Since the introduction of the very act of written
     communication was inextricably tied to the new religion,
     many who did not endorse the Christian faith simply refused
     to acknowledge the new mode of information.
[8]       Clearly the introduction of the hand-press in this
     context did not have the effect of popularizing written
     communication that it had in western Europe on the eve of
     the Reformation.  While differences in the social structures
     of the two cultures might be cited as the major contributing
     factors in this differentiation, the privileged status of
     chirography in pre-Reformation Europe clearly at least
     served to buttress the social structure of that culture,
     while the absence of any form of written culture in the case
     of the Native American tribe equally served to buttress a
     quite distinct social structure.  Both structures were
     undermined by the introduction of a new mode of information,
     but in very different ways.  While a totalizing metaphor may
     be put to effective use in an account of this
     differentiation, Poster's four-stage delineation is simply
     too coarse to serve.  Clearly, a distinction must be drawn
     between a culture which partakes only of oral exchanges and
     one in which oral exchange is coupled with some form of
     written exchange.  Equally clearly, a similar distinction
     needs to be drawn between written exchanges mediated by
     chirographic writing and written exchanges mediated by
     typographic writing.  The latter of these could be further
     subdivided into two stages: the first mediated by hand-press
     reproduction, and the second by machine-press reproduction.
     The importance of this latter distinction is borne out by
     the study of the growth of literacy in nineteenth-century
     Europe following the introduction of the mechanized press
     (cf. Altick and Eisenstein).
[9]       Between Poster's third stage--written exchanges
     mediated by print--and his fourth--electronically mediated
     exchange--lies much of the nineteenth and twentieth
     centuries, for although he does at one point acknowledge the
     nineteenth century origins of electronically mediated
     information systems in the telegraph and photography (19),
     his analysis of such systems is limited to the telephone,
     television advertising, databases, computer writing and
     computer science.  The inclusion of the machine-press
     production stage suggested above accounts for a large share
     of the information technology of the nineteenth century, but
     the end of that century and the first half of the next, it
     seems to me, several quite distinct modes of information
     transfer have emerged which may help to provide a bridge
     from written exchanges to electronically mediated exchange
     and, particularly, to multimedia exchange mediated
     electronically.
[10]      We might group the various non-computer modes of
     information available in the twentieth century in a variety
     of ways; I would like to propose one such classificatory
     scheme based, as is Poster's, on the wrapping of exchange:
          verbal media:       telegraph, radio, telephone
          visual media:       visual arts media (painting,
                              sculpture, etc), photography
          combinatory media:  offset printing, film, television,
                              video
     The first group fits neatly into Poster's progression, since
     it participates in the wrappings of language.  Historically,
     it is characterized by progressively orally mediated
     electronic exchange, which might be seen as an inversion of
     the pattern found in the Poster's earlier stages.  The fit
     of the second and third groups into Poster's schema is more
     problematic because, despite his statement that the study of
     the mode of information "must include a study of the forms
     of information storage and retrieval, from cave painting
     and clay tablets to computer databases and communications
     satellites" (7), his pre-electronic mediation stages are all
     decisively characterized by their participation in the
     wrappings of language.  Nonetheless, visual means of
     communication and information transfer have always
     existed--from cave paintings to religious icons to Gothic
     cathedrals to paintings, sculpture, and other visual arts
     media.  The information-poor, one might even argue, have
     historically relied on the visual media as their primary
     mode of reproducible information transfer.  Certainly this
     was true in Western Europe before the growth of literacy,
     and even today scholars point to the democratizing effect of
     television.
[11]      Also evident in the development of twentieth-century
     modes of information is a ever-increasing trend toward
     synchronous combinatory media.  This January, AT&T announced
     the release of its first videophone, the latest
     manifestation of a trend which began with film and has
     progressed through television, video, and in the last few
     years, developments in multimedia computing.  The design of
     synchronous combinatory exchange is necessarily unlike that
     of written exchange.  The organizing principle of
     combinatory exchange in its simplest form is synchronicity
     rather than sequence (which is essential to all forms of
     written exchange).  Both forms are linear to some degree--
     both rely on a time-line of expression.  In written
     exchange, linearity is an overt feature of the expression.
     In the case of synchronous combinatory exchange, linearity
     is only covertly present since the elements of a
     synchronized combinatory expression must be aligned in time.
     In an analog environment this alignment creates a singular
     linear expression.  In a digital environment, on the other
     hand, the expression may be multiple, may consist of a
     multiplicity of lines.
[12]      While historicism clearly must inform such a totalizing
     metaphor as Poster's "mode of information," Poster's
     objective is equally clearly trans-historical:
          the stages are not 'real,' not 'found' in the documents
          of each epoch, but imposed by the theory as a
          necessary step in the process of attaining knowledge.
          In this sense the stages are not sequential but
          coterminous in the present.  They are not consecutive
          also since elements of each are at least implicit in
          the others.  The logical status of the concept of the
          mode of information is both historical and
          transcendental.  In that sense the latest stage is not
          the privileged, dialectical resolution of previous
          developments.  In one sense, however, a sense that Marx
          anticipated, the current configuration constitutes a
          necessary totalization of earlier developments: that
          is, one cannot but see earlier developments from the
          situation of the present.  The anatomy of the mode of
          electronic information . . . necessarily sheds new
          light on the anatomy of oral and print modes of
          information . . . .  I prefer to consider the present
          age as simply an unavoidable context of discursive
          totalization, not as an ontological realization of a
          process of development.  (6-7)
 
 
     THEORIZING
 
[13]      From within this context of discursive totalization,
     other possibilities suggest themselves.  In _A Thousand
     Plateaus_ (1970), Deleuze and Guattari propose a different
     history of written exchange.  "Writing," they claim, "has
     nothing to do with signifying.  It has to do with surveying,
     mapping, even realms that are yet to come" (4-5).  Their
     history is delineated in terms of types of books.  There are
     three types of books, the first being historically the
     earliest and the third the most recent, but all three are
     coterminous in the present.  The first type they describe as
     the root-book.  The root-book "imitates the world, as art
     imitates nature: by procedures specific to it that
     accomplish what nature cannot or can no longer do" (5).  The
     second type is the radicle-system, or fascicular root book.
     "This time, the principal root has aborted, or its tip has
     been destroyed; an immediate, indefinite multiplicity of
     secondary roots grafts onto it and undergoes a flourishing
     development" (5).  The approximate characteristics of
     Deleuze and Guattari's third book type--the rhizome--clearly
     indicate a departure from the book as printed codex to
     electronically mediated exchange:
          1. and 2. principles of connection and heterogeneity;
          3. principle of multiplicity; 4. principle of
          asignifying rupture; and 5. principles of cartography
          and decalcomania.  (7-9)
     The significance of this taxonomy for this discussion is
     that its classification, unlike Poster's, is entirely
     media-independent, gaining its meaning, so to speak, from a
     delineation of structure or design.
[14]      The root-book roughly corresponds to written
     communication prior to the development of the paste-up
     technique (which Deleuze and Guattari refer to as
     assemblage; 4) in the early part of the twentieth century.
     Its history is one of linear production.  In its earliest
     form, the writing of the root-book was synonymous with its
     publication.  Today, the production of the root-book is
     still characterized as a linear process consisting of five
     steps: 1. writing of a manuscript; 2. submission/editing of
     the manuscript; 3. the composition of the manuscript in
     type; 4. the proofing of the type sheets; and 5. the
     dissemination of the publication.  The production process
     for the radicle-system book is much lengthier, requiring the
     addition of at least two additional steps, the first, the
     mock-up or layout stage normally falling between the second
     and third root-book steps; and the second, the paste-up
     stage falling between the third and fourth steps in the
     production of the root-book.  In its earliest manifestations
     (and still today in the certain fine-printing and vanity
     publishing circles), the production of the root-book is
     characterized by oneness and stability.  Even in its more
     recent manifestations, the root-book strives to be an exact
     replica of the author's words, a representation or
     signification of an individual's thoughts.  Even as the
     production process has fragmented (through the intervention
     of editors, publishers, printers who are not the author), it
     has maintained its linearity.  Likewise, the publication has
     retained its insularity and rootedness.
[15]      In contrast, the design of the radicle-system book is
     fragmented and multifarious, and while representation is
     still employed as an element, it is only one of many couched
     in layers that problematize its signification.
     Interestingly, the technology which initially enabled this
     kind of production was photography.  The production process
     is less emphatically sequential, the organizing principle
     being collage or assemblage which allows for alteration and
     reorganization at almost every stage of the production
     process.  In some cases this process has extended even to
     the composition of the manuscript itself, as in the case of
     William S. Burroughs's cut-up texts, or, in a less
     mechanical implementation, in the poetry and critical
     writings of Rachel Blau DuPlessis.
[16]      Deleuze and Guattari describe a third type of book:
          A system of this kind could be called a rhizome.  A
          rhizome as a subterranean stem is absolutely different
          from roots and radicles.  Bulbs and tubers are
          rhizomes.  Plants with roots or radicles may be
          rhizomorphic in other respects altogether . . . .
          Burrows are too, in all their functions of shelter,
          supply, movement, evasion, and breakout.  The rhizome
          itself assumes very diverse forms, from ramified
          surface extension in all directions to concretion into
          bulbs and tubers . . . .  The rhizome includes the best
          and the worst: potato and couchgrass, or the weed.
          (6-7)
     Telecommunications systems are rhizomorphic, as are computer
     networks.  Think of maps you have seen and descriptions you
     have heard of the internet--a rhizome.  If we accept the
     rhizome as a metaphor for electronically mediated exchange,
     then hypertext is its apparent fulfillment, and Deleuze and
     Guattari's "approximate characteristics of the rhizome"--
     principles of connection, heterogeneity, multiplicity,
     asignifying rupture, and cartography and decalcomania--may
     be seen as the principles of hypertextual design.
 
 
     PRINCIPLES OF CONNECTION AND HETEROGENEITY
 
[17]      The principles of connection and heterogeneity state
     that "any point of a rhizome can be connected to any other,
     and must be" (Deleuze & Guattari 7).  In this sense a
     rhizome is very different from a tree structure, where the
     order is fixed by a hierarchy of relationships.  Cognitive
     jumps, which must be mechanically forced in an hierarchy,
     are intuitively sustained in a rhizome.  A rhizome is the
     only structure which can effectively sustain connections
     between different media without giving hegemony to language.
     Many current relational and flatfile multimedia database
     applications support the storage of multiple forms of media,
     and some will even display different types contiguously, but
     keyword searching is the only mechanism provided for
     cross-type searching.  Like film and video, they support
     synchronous display (but then, so can the book, albeit with
     limitations), but they do not support nonverbal access.
     Traditional hierarchical database structures are even more
     problematic in their support of nonverbal expression.
     Meaningful formation of hierarchies across media boundaries
     can be accomplished only through the use of language, since
     hierarchy is itself a creation of language, and therefore,
     language is the only universal tool available within an
     hierarchical structure.  A rhizomorphic structure, on the
     other hand, does not rely on language for its ordering,
     although many of the linkages in a given structure may be
     linguistic.
[18]      A rhizome ceaselessly establishes connections between
     semiotic chains, organizations of power, and circumstances
     relative to the arts, sciences, and social struggles.  A
     semiotic chain is like a tuber agglomerating very diverse
     acts, not only linguistic, but also perceptive, mimetic,
     gestural, and cognitive; there is no language in itself, nor
     are there any linguistic universals, only a throng of
     dialects, patois, slangs, and specialized languages (7).
[19]      Hypermedia design is rhizomorphic in its sustenance of
     heterogeneous connection, because there is no systemic
     hierarchy of connection.  The perception of connectivity is
     entirely left to the user, though the pre-existence of
     particular connections may foster varying user perceptions
     of overall structure.  At its most political, connectivity
     is a democratizing principle.  It functions as a structure
     of individuation since at any given moment the "center" of
     any rhizomorphic structure is the individual's position in
     relation to that structure.  Distinctions between author and
     reader, constituent and politician, even intermediary and
     end-user disintegrate as the reader participates in
     authorship, constituent in %polis%, and end-user in the
     search itself.  At its worse, connectivity inspires anarchy.
     Witness (as we all did) the impact of limited connectivity
     (exclusive of the important element of interactivity) via
     the broadcast of a videotape of the arrest in the case of
     the aftermath of the Rodney King verdict.
[20]      As the distinctions between participant/viewer,
     author/reader blur, the concept of authorship itself will be
     problematized.  All paths through hyperspace are equally
     valid to the individual traveller.  As the "reader"
     negotiates hyperspace he/she becomes a navigator--traversing
     established links to pre-existent nodes; but also an
     explorer--creating new links to previously known, but
     unrelated territories; a pioneer--venturing forth into
     uncharted realms; and a visionary--imagining and giving
     shape to the as-yet unknown.
 
 
     PRINCIPLE OF MULTIPLICITY
 
          Act so that there is no use in a centre . . . .
                                             --Stein, 63
 
          A multiplicity has neither subject nor object, only
          determinations, magnitudes, and dimensions that cannot
          increase in number without the multiplicity changing in
          nature . . . .  An assemblage is precisely this
          increase in the dimensions of a multiplicity that
          necessarily changes in nature as it expands its
          connections.  There are no points or positions in a
          rhizome, much as those found in a structure, tree or
          root.  There are only lines.
                                   --Deleuze & Guattari, 8
 
[21]      Hypertextual design is able to support non-hierarchical
     thinking and cognitive jumping because it recognizes the
     diversity of multifarious modes of information.  Information
     may be structured hierarchically within a hypermedia system,
     but only to the extent that such a structure exists in a
     coterminous relationship with other structures.  In other
     words, hypertextual design presupposes not only that
     multiple points of access are preferable to a single point,
     but by extension, that multiple structures are preferable to
     a single structure.  Information retrieval studies have
     shown that a single user's selection of access points for a
     given topic may vary over time and space, making it
     difficult for an indexer to predict potential user
     vocabulary.  The principle of multiplicity is reflected in
     hypertextual design by the coterminous presence of varying
     modes of access to a single structure on the one hand, and
     of varying structures on the other.
[22]      Landow and others have noted the hypertextual nature of
     pre-hypertext literary projects from Sterne's _Tristram
     Shandy_ to Robert Coover's _Pricksongs and Descants_.  Yet
     the lists I have seen are conspicuous in their omission of
     female writers and feminist critics, not to mention writers
     of color.  I have already mentioned Rachel Blau DuPlessis,
     but there are others who might be mentioned as well--Emily
     Dickinson, Gertrude Stein, Zora Neale Hurston--all of whom
     practice a writing of inclusion and fragmentation, of absent
     centers and centered absence.  Multiplicity, as a
     hypertextual principle, recognizes a multiplicity of
     relationships beyond the canonical (hierarchical).  Thus,
     the traditional concept of literary authorship comes under
     attack from two quarters--as connectivity blurs the boundary
     between author and reader, multiplicity problematizes the
     hierarchy that is canonicity.
 
 
     PRINCIPLE OF ASIGNIFYING RUPTURE
 
[23]      Hypertextual design intuitively supports two forms of
     access which must be forced in hierarchical structures:
     user-generated access and mapping.  The principle of
     asignifying rupture supports the former, and those of
     cartography and decalcomania, the latter.  In an
     hierarchical structure, a user-generated access point may
     cause a rupture in the system.  For example, in a database
     search, a user may, through the process of serendipity,
     arrive at a particular point in a hierarchy, even though her
     departure-point has no apparent hierarchical relationship to
     that arrival point.  If she is allowed to introduce a link
     from her departure term to her arrival point into the
     hierarchy without further evaluation, the very structure of
     that hierarchy might well be undermined.  One might view the
     project of feminist criticism in this light.  The
     introduction of non-canonical texts and authors into the
     canon disrupts the foundations of the canon altogether.
     In contrast, hypertextual design encourages such disruptive
     activity while rendering it insignificant.  Since the
     structure does not rely on any given theory of relationship,
     it cannot be affected by the characterization of a new
     relationship previously alien to it.  The potential for any
     relationship exists within the hypertextual structure; some
     simply await unmasking.
 
 
     PRINCIPLES OF CARTOGRAPHY AND DECALCOMANIA
 
[24]      The second form of access not easily supported within
     an hierarchy is mapping.  Tracings or logs of an
     individual's progress through an hierarchical database are
     of course possible and may help a user to retrace a given
     path, or provide useful data for research in human-computer
     interaction.  Current maps of search paths exist in the form
     of recordings of transactions, though the best systems
     record only the user query and the system response, without
     making a record of the context of either query or response.
     The records thus constructed are divorced from context,
     non-relational, and perhaps most importantly, non-spatial.
     They are grammatic, rather than diagrammatic.  They
     perpetuate the hegemony of language and de-emphasize the
     sense of a journey through space and time.  Deleuze and
     Guattari's notion of mapping is, however, quite different,
     and presupposes the operation of the principles discussed
     previously.
[25]      Each user's path of connection through a database is as
     valid as any other.  New paths can be grafted onto the old,
     providing fresh alternatives.  The map orients the user
     within the context of the database as a whole, but always
     from the perspective of the user.  In hierarchical systems,
     the user map generally shows the user's progress, but it
     does so out of context.  A typical search history displays
     only the user's queries and the system's responses.  It does
     not show the system's path through the database.  It does
     not display rejected terms, only matches.  It does not
     record the user's psychological responses to what the system
     presents.  On additional command, it may supply a list of
     synonyms or related terms, but this is as far as it can go
     in displaying the territory surrounding the request.  It can
     only understand hierarchy, so it can only display
     hierarchical relationships.  What distinguishes the map from
     the tracing is that it is entirely oriented toward an
     experimentation in contact with the real.  The map does not
     reproduce an unconscious closed in upon itself; it
     constructs the unconscious.  It fosters connections between
     fields, the removal of blockages on bodies without organs,
     the maximum opening of bodies without organs onto a plane of
     consistency.  It is itself a part of the rhizome.  The map
     is open and connectable in all of its dimensions; it is
     detachable, reversible, susceptible to constant modification
     (12).
[26]      A hypertextual map is more closely related to
     geographic maps than to search histories.  It shows the path
     of the user through the surrounding territory, but always
     from the point-of-view of the user.  It is as though the map
     were perpetually shifting as the traveller moved from one
     quadrant to the next.  Some of that territory is charted--it
     is well mapped out in terms that the user understands, and
     connected to familiar territory or nodes--and some is
     uncharted, either because it consists of unlinked nodes that
     exist in the database much as an undiscovered island might
     exist in the sea, disconnected from the lines of transfer
     and communication linking other land areas, or as an
     unidentified planet in space, with the potential for
     discovery and even exploration, but as yet just a glimmer in
     the sky--or because it is linked in ways that are
     meaningless to the user in his present context.  The user
     can zoom in on zones of interest, jump to new territories
     using previously established links or by establishing new
     links of his own, retrace an earlier path, or create new
     islands or nodes and transportation routes or links to
     connect them to his previous path or the islands or nodes
     charted by others.
[27]      The rhizome operates by variation, expansion, conquest,
     capture, offshoots.  Unlike the graphic arts, drawing, or
     photography, unlike tracings, the rhizome pertains to a map
     that must be produced, constructed, a map that is always
     detachable, connectable, reversible, modifiable, and has
     multiple entryways and exits and its own lines of flight.
     It is tracings that must be put on the map, not the
     opposite.  In contrast to centered (even polycentric)
     systems with hierarchical modes of communication and
     preestablished paths, the rhizome is an acentered,
     nonhierarchical, nonsignifying system without a General and
     without an organizing memory of central automaton, defined
     solely by a circulation of states (21).
[28]      Hypertext is rhizomorphic in all its characteristics.
     Its power derives from its flexibility and variability; from
     its ability to incorporate, transmute and transcend any
     traditional tool or structure.  Like the rhizome, it is
     frightening because it is amorphous.  The hierarchical
     systems we are accustomed to are definitional--they are
     centers of power.  Knowledge of the hierarchy engenders
     authority; corrupted authority breeds despotism.  Knowledge
     of the rhizome as a totality is impossible, precisely
     because "totality" and other absolutes have no meaning in a
     rhizome.  The rhizome is as individual as the individual in
     contact with it.  It is that individual's perception, that
     individual's map, that individual's understanding.  It is
     also, and at the same time, a completely different
     something--another individual's perception, another
     individual's map, another individual's understanding.  It
     provides no structure for common understanding.  It is a
     state of being, reflective always of the present, a plateau
     in a region made up entirely of plateaus--"a continuous,
     self-vibrating region of intensities whose development
     avoids any orientation toward a culmination point or
     external end" (Deleuze & Guattari 22).
 
     -----------------------------------------------------------
 
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