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Line 16 Line 16
   
 \author{Robert Casties, Dirk Wintergrün, Hans-Christoph Liess}  \author{Robert Casties, Dirk Wintergrün, Hans-Christoph Liess}
   
 \date{V1.0.3 of 11.9.2003}  \date{V1.3.5 of 28.1.2010}
   
 \begin{document}  \begin{document}
   
Line 32  File and directory names should not cont Line 32  File and directory names should not cont
 in filenames are only the alphanumeric set a-z, A-Z, 0-9, hyphen  in filenames are only the alphanumeric set a-z, A-Z, 0-9, hyphen
 ``-'', underscore ``\_'' and dot ``.''.  ``-'', underscore ``\_'' and dot ``.''.
   
 File and directory paths in the metadata file use the conventional  Files and directories with names that contain illegal characters must
 Unix file separator slash ``/''.  be transformed to allowed names. A proposition for a simple
   transformation rule is
   
   \begin{itemize}
   \item whitespace characters (e.g. blank, tab, cr, lf) are replaced by
     hyphens ``-''
   
   \item other illegal characters are replaced by underscores ``\_''.
   \end{itemize}
   
   This rule does not provide a reversible mapping to the original
   illegal file name and it does not provide a collision-free mapping,
   i.e. two different illegal file names might be mapped to the same
   allowed file name. Additional precautions for these cases must be
   taken.
   
   
 \section{Metadata files}  \section{Metadata files}
Line 45  files are possible: Line 59  files are possible:
 \begin{itemize}  \begin{itemize}
 \item a file named \texttt{index.meta} in a directory.  \item a file named \texttt{index.meta} in a directory.
   
 \item a file named like the data file it describes with an  \item a file with the same name as the data file it describes and an
   additional extension \texttt{.meta}. For example metadata for the    additional extension \texttt{.meta}. For example metadata for the
   file \texttt{0001.tif} would be in a file \texttt{0001.tif.meta}.    file \texttt{p0001.tif} would be in a file \texttt{p0001.tif.meta}.
 \end{itemize}  \end{itemize}
   
 The resource directory must contain an \texttt{index.meta} file with  The resource directory must contain an \texttt{index.meta} file with
 information about the resource as a whole. Other directories can  information about the resource as a whole. Subdirectories can
 contain \texttt{index.meta} files.  contain additional \texttt{index.meta} files.
   
 Additional information about single data files that are part of the  Additional information about single data files that are part of the
 resource can either be put in \texttt{file} tags in the  resource can either be put in \texttt{file} tags in the
 \texttt{index.meta} file or in separate \emph{filename}\texttt{.meta}  \texttt{index.meta} file or in separate \emph{filename}\texttt{.meta}
 files for each data file. Information from the directory level file is  files for each data file. Information from the directory level file is
 inherited at the file level.  inherited at the file level when it is not overwritten.
   
   
 \section{Resource format}  \section{Resource format}
Line 72  supplied by the provider of the resource Line 86  supplied by the provider of the resource
 automatic scripts later in the process, these elements must be present  automatic scripts later in the process, these elements must be present
 in the final file.  in the final file.
   
   File and directory paths in the metadata file use the conventional
   Unix file separator slash ``/''.
   
 The outer container element is \texttt{resource}. It has the following  The outer container element is \texttt{resource}. It has the following
 \textbf{attributes}:  \textbf{attributes}:
   
 \begin{description}  \begin{description}
 \item[type] sub-type of resource (e.g. ``ECHO'',  \item[type] sub-type of resource (e.g. ``ECHO'', ``MPIWG'') --
   ``MPIWG'') -- optional.    optional.
       
 \item[version] version number of metadata format (currently 1.0) --  \item[version] version number of metadata format (currently 1.2) --
   required.    required.
 \end{description}  \end{description}
   
 \noindent The allowed \textbf{elements} inside \texttt{resource} are:  \noindent The allowed \textbf{elements} inside \texttt{resource} are:
   
 \begin{description}  \begin{description}
 \item[description] An informal textual description of the  \item[description] An informal textual description of the resource --
   resource -- optional.    optional\footnote{At least one description of the resource's content
       is required. The description can be an informal
       \texttt{description} element or a descriptive element (like
       \texttt{bib}) in a \texttt{meta} container.}.
   
 \item[name] The filename of the resource (name of the directory this  \item[name] The filename of the resource (name of the directory this
   file is contained in) -- required.    file is contained in) -- required.
Line 104  The outer container element is \texttt{r Line 124  The outer container element is \texttt{r
 \item[archive-path] The full path to the resource directory inside the  \item[archive-path] The full path to the resource directory inside the
   whole archive collection, including the resource directory -- deduced.    whole archive collection, including the resource directory -- deduced.
       
   \item[archive-id] The ID for this document in the archive --
     optional.
     
 \item[derived-from] Container for the description of the original  \item[derived-from] Container for the description of the original
   resource if this resource is a modified version of another resource    resource if this resource is a modified version of another resource
   -- optional.    -- optional.
   
   \begin{description}    \begin{description}
     \item[archive-id] The ID of the original resource
       -- required (or archive-path).
   
   \item[archive-path] The full path to the original resource    \item[archive-path] The full path to the original resource
     --required.      -- required (or archive-id).
   
     \item[description] An informal textual description of the relation
     of this resource to the original resource -- optional.
     \end{description}
     
   \item[used-by] Container for the description of modified resources
     if this resource is the source of another resource
     -- optional.
   
     \begin{description}
     \item[archive-id] The ID of the derived resource
       -- required (or archive-path).
   
     \item[archive-path] The full path to the derived resource
       -- required (or archive-id).
   
   \item[description] An informal textual description of the relation    \item[description] An informal textual description of the relation
   of this resource to the original resource -- optional.    of this resource to the original resource -- optional.
Line 121  The outer container element is \texttt{r Line 162  The outer container element is \texttt{r
   -- optional.    -- optional.
   
   \begin{description}    \begin{description}
     \item[archive-id] The ID of the linked resource
       -- required (or archive-path).
   
   \item[archive-path] The full path to the linked resource    \item[archive-path] The full path to the linked resource
     --required.      -- required (or archive-id).
   
   \item[description] An informal textual description of the relation    \item[description] An informal textual description of the relation
   of this resource to the linked resource -- optional.    of this resource to the linked resource -- optional.
   \end{description}    \end{description}
       
 \item[content-type] The content type of this resource -- required.\\  \item[media-type] \label{tag-media-type} The main media type of this
   The content type enables the choice of tools to manipulate and    resource -- required.\\ The main media type can be overridden by
   display the resource. There should be a common list of content    \texttt{media-type}s in subdirectories. Possible types are
   types. For digital documents (books, manuscripts) this would be    \begin{itemize}
   "scanned document", for other image data "scanned    \item \texttt{image}
   images".\footnote{The criterion for documents is a ordered  
     succession of image files (pages) and equal image size and    \item \texttt{text}
     resolution throughout the images of a resource.}  
     \item \texttt{audio}
   
     \item \texttt{video}
   
     \item \texttt{data} for other type of data
     \end{itemize}
       
 \item[meta] Additional metadata information about the resource --  \item[meta] Additional metadata information about the resource --
   optional.\\ For a description of additional metadata see below.    optional.\\ For a description of additional metadata see below.
Line 151  The outer container element is \texttt{r Line 201  The outer container element is \texttt{r
   
   \item[name] The name of the subdirectory -- required.    \item[name] The name of the subdirectory -- required.
           
     \item[original-name] A text string associated with the directory as
       original name -- optional. (E.g. if the data in this directory
       came from an external source and had a name that had to be changed
       according to section~\ref{sec:file-directory-names} but it should
       be possible to reference the original name.)
       
   \item[path] The directory path of this subdirectory relative to the    \item[path] The directory path of this subdirectory relative to the
     resource's root directory (excluding the directory itself) --      resource's root directory (excluding the directory itself) --
     required (may be empty or omitted if the directory is a direct      required (may be empty or omitted if the directory is a direct
Line 170  The outer container element is \texttt{r Line 226  The outer container element is \texttt{r
   
   \item[name] The name of the file -- required.    \item[name] The name of the file -- required.
           
     \item[original-name] A text string associated with the file as
       original name -- optional. (e.g. if this file came from an
       external source and had a name that had to be changed according to
       section~\ref{sec:file-directory-names} it is possible
       to preserve the original name.)
       
   \item[path] The directory path of this file relative to the    \item[path] The directory path of this file relative to the
     resource's root directory (excluding the file itself) -- required      resource's root directory (excluding the file itself) -- required
     (may be empty or omitted if the file is in the resource's root      (may be empty or omitted if the file is in the resource's root
Line 201  The outer container element is \texttt{r Line 263  The outer container element is \texttt{r
 \label{sec:additional-metadata}  \label{sec:additional-metadata}
   
 All elements with \texttt{meta} tags can contain an arbitrary number  All elements with \texttt{meta} tags can contain an arbitrary number
 of additional metadata elements.  of the following additional metadata elements.
   
   \subsection{Workflow state}
   \label{sec:workflow-state}
   
   All additional metadata elements can have a \texttt{workflow-state}
   \textbf{attribute}. This attribute reflects the state of the
   corresponding metadata element. The possible values for the
   \texttt{workflow-state} attribute are
   \begin{itemize}
   \item \texttt{preliminary} this information is preliminary. It must
     be checked in further workflow steps.
   
   \item \texttt{inwork}
   
   \item \texttt{final}
   \end{itemize}
   
   workflow states other than \texttt{preliminary} are part of the
   workflow handling of the respective projects.
   
   Metadata elements can appear multiple times with different
   \texttt{workflow-state} attributes. This enables metadata versioning.
   
   
   
   \subsection{Content type}
   \label{sec:content-type}
   
   \begin{description}
   \item[content-type] \label{tag-content-type} The content type of this
     resource -- required.\\
     The content type enables the choice of tools to manipulate and
     display the resource. There should be a common list of content
     types. For digital documents (books, manuscripts) this would be
     "scanned document", for other image data "scanned
     images".\footnote{The criterion for documents is a ordered
       succession of image files (pages) and equal image size and
       resolution throughout the images of a resource.}
   \end{description}  
   
   
   
 \subsection{Language}  \subsection{Language}
 \label{sec:lang}  \label{sec:lang}
Line 229  on the page Line 332  on the page
 \subsection{Collection context}  \subsection{Collection context}
 \label{sec:collection-context}  \label{sec:collection-context}
   
 The context of a resource as part of a collection or part of a project can be  The context of a resource as part of a collection or part of a project
 specified in the \texttt{context} element. All elements in the  can be specified in the \texttt{context} element. The context element
 container can appear multiple times.  can appear multiple times if the resource is part of multiple
   collections or projects.
   
 \begin{description}  \begin{description}
 \item[context] information on collection or project context.  \item[context] information on collection or project context.
   
   \begin{description}    \begin{description}
   \item[link] URL to additional context information.    \item[link] URL to additional context information -- optional.
       
     \item[name] Textual description of project or collection -- optional.
   
     \item[meta-datalink] description of external sources of canonical meta
       information -- optional
       \begin{description}
       \item[db] \textbf{attribute} to identify different sets of meta data
         links to the same resource -- optional
   
       \item[object] \textbf{attribute} to identify different objects or
         parts of the same resource -- optional
   
       \item[label] textual label for the link -- optional
   
       \item[url] URL to present to the client -- optional
   
       \item[metadata-url] URL to an external server to be queried -- optional
       \end{description}
   
     \item[meta-baselink] description of external server for canonical meta
       information -- optional
       \begin{description}
       \item[db] \textbf{attribute} to identify different sets of meta data
         links to the same resource -- optional
   
       \item[label] textual label for the link -- optional
           
   \item[name] Textual description of project or collection.      \item[url] URL to present to the client -- optional
         
       \item[metadata-url] URL to an external server to be queried --
         required (the parameter \texttt{object=} with an object id has
         to be appended to this URL)
       \end{description}
   \end{description}    \end{description}
 \end{description}  \end{description}
   
Line 282  the commonly used program ``EndNote''. Line 417  the commonly used program ``EndNote''.
     published in multiple volumes.      published in multiple volumes.
   \item [translator] Name of the translator.    \item [translator] Name of the translator.
   \item [isbn-issn]    \item [isbn-issn]
     \item[call-number] Call number in holding library
     \item[holding-library] Holding library
   \end{description}    \end{description}
 \end{description}  \end{description}
   
Line 310  the commonly used program ``EndNote''. Line 447  the commonly used program ``EndNote''.
     published in multiple volumes.      published in multiple volumes.
   \item [translator] Name of the translator    \item [translator] Name of the translator
   \item [isbn-issn]    \item [isbn-issn]
     \item[call-number] Call number in holding library
     \item[holding-library] Holding library
   \end{description}    \end{description}
 \end{description}  \end{description}
   
Line 338  the commonly used program ``EndNote''. Line 477  the commonly used program ``EndNote''.
   \item [number-of-volumes] Number of volumes, if the the book is    \item [number-of-volumes] Number of volumes, if the the book is
     published as multiple volumes.      published as multiple volumes.
   \item [isbn-issn]    \item [isbn-issn]
     \item[call-number] Call number in holding library
     \item[holding-library] Holding library
   \end{description}    \end{description}
 \end{description}  \end{description}
   
Line 363  the commonly used program ``EndNote''. Line 504  the commonly used program ``EndNote''.
   \item [number-of-volumes] Number of volumes, if the the book is    \item [number-of-volumes] Number of volumes, if the the book is
     published as multiple volumes.      published as multiple volumes.
   \item [isbn-issn]    \item [isbn-issn]
     \item[call-number] Call number in holding library
     \item[holding-library] Holding library
     \end{description}
   \end{description}
   
   \subsubsection{Journal Volume}
   
   \begin{description}
   \item [bib type="journal-volume"] a volume of a scientific journal.
     \begin{description}
     \item [title] Name of the journal.
     \item [editor] The editor of the journal.
     \item [publisher] Name of the publishing company.
     \item [city] City where the journal is published.
     \item [year] The year of publication.
     \item [volume] Volume number.
     \item [numer-of-pages] Number of pages of the volume.
     \item [isbn-issn]
     \item[call-number] Call number in holding library
     \item[holding-library] Holding library
   \end{description}    \end{description}
 \end{description}  \end{description}
   
Line 380  the commonly used program ``EndNote''. Line 541  the commonly used program ``EndNote''.
   \item [pages] Number of pages of the article.    \item [pages] Number of pages of the article.
   \item [alternate-journal] Alternate Journal    \item [alternate-journal] Alternate Journal
   \item [isbn-issn]    \item [isbn-issn]
     \item[call-number] Call number in holding library
     \item[holding-library] Holding library
   \end{description}    \end{description}
 \end{description}  \end{description}
   
Line 396  the commonly used program ``EndNote''. Line 559  the commonly used program ``EndNote''.
   \item [issue-number] Number of the issue the article is part of.    \item [issue-number] Number of the issue the article is part of.
   \item [pages Number] of pages of the article.    \item [pages Number] of pages of the article.
   \item [date] Date when the article appeared.    \item [date] Date when the article appeared.
     \item[call-number] Call number in holding library
     \item[holding-library] Holding library
   \end{description}    \end{description}
 \end{description}  \end{description}
   
Line 411  the commonly used program ``EndNote''. Line 576  the commonly used program ``EndNote''.
   \item [pages] Number of pages of the article.    \item [pages] Number of pages of the article.
   \item [issue-date] Date of the issue the article is part of.    \item [issue-date] Date of the issue the article is part of.
   \item [city] City of the newspaper.    \item [city] City of the newspaper.
     \item[call-number] Call number in holding library
     \item[holding-library] Holding library
   \end{description}    \end{description}
 \end{description}  \end{description}
   
Line 429  the commonly used program ``EndNote''. Line 596  the commonly used program ``EndNote''.
   \item [University] Name of the university where the thesis was    \item [University] Name of the university where the thesis was
     handed in.      handed in.
   \item [isbn-issn]    \item [isbn-issn]
     \item[call-number] Call number in holding library
     \item[holding-library] Holding library
   \end{description}    \end{description}
 \end{description}  \end{description}
   
Line 446  the commonly used program ``EndNote''. Line 615  the commonly used program ``EndNote''.
   \item [institution] Institution where the report was produced.    \item [institution] Institution where the report was produced.
   \item [type] Type of report.    \item [type] Type of report.
   \item [report-number] Report number.    \item [report-number] Report number.
     \item[call-number] Call number in holding library
     \item[holding-library] Holding library
   \end{description}    \end{description}
 \end{description}  \end{description}
   
Line 467  the commonly used program ``EndNote''. Line 638  the commonly used program ``EndNote''.
     annotations etc.      annotations etc.
   \item [description] This can be any kind of description.    \item [description] This can be any kind of description.
   \item [keywords] Keywords related to the manuscript.    \item [keywords] Keywords related to the manuscript.
     \item[call-number] Call number in holding library
     \item[holding-library] Holding library
     \end{description}
   \end{description}
   
   
   \subsubsection{Correspondence}
   
   \begin{description}
   \item [bib type="correspondence"] a piece of correspondence e.g. letter, telegram, in the following called ``letter''
   
     \begin{description}
     \item[type] The type of correspondence, e.g. ``letter'', ``postcard'', ``telegram'', ``letter draft''
     \item [author] The author/sender of the letter.
     \item [recipient] The recipient of the letter.
     \item [date] normalised date of the letter.
     \item [date-range-end] end of range of uncertain dating -- optional.
     \item [date-original] the date in its original form as noted on the letter -- optional.
     \item [place] place where the letter was written/sent.
     \item [title] Title of the letter -- optional.
     \item[incipit] The opening phrase of the letter -- optional.
     \item[excipit] The closing phrase of the letter -- optional.
     \item [pages] Number of pages of the manuscript.
     \item [signature] Canonical signature/call number of the manuscript.
     \item [description] This can be any kind of description.
     \item [keywords] Keywords related to the manuscript.
     \item[call-number] Call number in the current holding library
     \item[holding-library] current holding library
   \end{description}    \end{description}
 \end{description}  \end{description}
   
Line 615  tags. Line 814  tags.
 %%\url{http://pythia.mpiwg-berlin.mpg.de/toolserver/TS_lise}  %%\url{http://pythia.mpiwg-berlin.mpg.de/toolserver/TS_lise}
   
   
 \subsection{Scanned images}  \subsection{Digital images}
 \label{sec:inform-scann-imag}  \label{sec:inform-scann-imag}
   
 Image files representing scanned images can have an \texttt{img}  Image files representing scanned images can have an \texttt{img}
Line 629  Required is one of three possible sets o Line 828  Required is one of three possible sets o
 \item[img] digital image information.  \item[img] digital image information.
   
   \begin{description}    \begin{description}
   \item[original-size-x] The width of the original image. The unit of    \item[original-size-x] The width of the original
     measure can be contained as parameter \texttt{unit}, the default      image -- required. \\
     is meter ``m''. The width to be considered is the total width of      The unit of measure can be contained as parameter \texttt{unit},
     the scanned area.      the default is meter ``m''. The width to be considered is the
       total width of the scanned area.
           
   \item[original-size-y] The height of the original image.    \item[original-size-y] The height of the original image -- required.
           
   \item[original-pixel-x] The width of the hi-res scan in pixels.    \item[original-pixel-x] The width of the hi-res scan in pixels -- deduced.
           
   \item[original-pixel-y] The height of the hi-res scan in pixels.    \item[original-pixel-y] The height of the hi-res scan in pixels -- deduced.
   \end{description}    \end{description}
 \end{description}  \end{description}
   
Line 649  or Line 849  or
   
   \begin{description}    \begin{description}
   \item[original-dpi-x] The resolution of the hi-res scan in its width    \item[original-dpi-x] The resolution of the hi-res scan in its width
     in pixels per inch.      in pixels per inch -- required.
   
   \item[original-dpi-y] The resolution of the hi-res scan in its height    \item[original-dpi-y] The resolution of the hi-res scan in its height
     in pixels per inch.      in pixels per inch -- required.
   
     \item[original-pixel-x] The width of the hi-res scan in pixels -- deduced.
       
     \item[original-pixel-y] The height of the hi-res scan in pixels -- deduced.
   \end{description}    \end{description}
 \end{description}  \end{description}
   
Line 663  or Line 867  or
   
   \begin{description}    \begin{description}
   \item[original-dpi] The resolution of the hi-res scan in pixels per    \item[original-dpi] The resolution of the hi-res scan in pixels per
     inch if the resolutions in width and height are the same.      inch if the resolutions in width and height are the same -- required.
   
     \item[original-pixel-x] The width of the hi-res scan in pixels -- deduced.
       
     \item[original-pixel-y] The height of the hi-res scan in pixels -- deduced.
   \end{description}    \end{description}
 \end{description}  \end{description}
   
   
   
 \subsection{Image acquisition}  \subsection{Digital image acquisition}
 \label{sec:inform-about-image}  \label{sec:inform-about-image}
   
 A description of the technology used in the process of producing a  A description of the technology used in the process of producing a
Line 680  digital image. Line 888  digital image.
   \begin{description}    \begin{description}
   \item[device] acquisition device (e.g. ``flatbed scanner'')    \item[device] acquisition device (e.g. ``flatbed scanner'')
   
   \item[image-type] type and color-depth of the image (e.g. ``RGB 24    \item[image-type] type and color-depth of the image -- required (e.g. ``RGB 24
     bit'')      bit'')
   
   \item[postproduction] additional operations on the image  
     (e.g. ``sharpening, color correction'')  
   
   \item[production-comment] additional textual information about the    \item[production-comment] additional textual information about the
     production process      production process
   \end{description}    \end{description}
 \end{description}  \end{description}
   
   
   
 \subsection{Full text with images}  \subsection{Full text with images}
 \label{sec:full-text-with}  \label{sec:full-text-with}
   
 Full text in a XML format will be specified with a  Full text in a XML format should be specified with a
 \texttt{content-type} ``fulltext''.  \texttt{content-type}\footnote{see section~\ref{tag-content-type}
   on page\pageref{tag-content-type}} ``fulltext''.
   
 The relation between the full text and optional images of  The relation between the full text and optional images of
 whole pages or parts of pages must be specified in a  whole pages or parts of pages must be specified in a
 \texttt{text-tool} container.  \texttt{texttool} container.
   
 \begin{description}  \begin{description}
 \item[text-tool] representation of full text with images  \item[texttool] representation of full text with images
   
   \begin{description}    \begin{description}
   \item[text-file] the file name of the full text file (with path    \item[text] the file name of the full text file (with path
     inside document directory)      inside document directory)
   
   \item[page-images] the directory name of the directory containig the    \item[text-url-path] a characteristic part of the URL with which the
     page image files (with path      full text can be retrieved (the form and content of this element
     inside document directory)      is dependent on the specific text retrieval mechanism)
       
     \item[image] the directory name of the directory containig the
       page image files (with path inside document directory)
   
   \item[xslt-file] the file name of an additional XSL transformation    \item[xslt] the file name of an additional XSL transformation
     file      file
   
   \item[text-config] container for configuration options    \item[pagebreak] the name of the element that indicates page breaks
       (default ``pb'')
     \end{description}
   \end{description}
   
   
   
   \subsection{Copyright and access conditions}
   \label{sec:access-conditions}
   
   If the access to a resource is bound to conditions for technical or legal
   reasons then the conditions can be put in a \texttt{access-conditions}
   container. Other usage conditions like copyright can also be
   documented in this container.
   
   \begin{description}
   \item[access-conditions] legal and technical conditions for access to
     this resource
   
     \begin{description}
     \item[attribution] The name or institution this resource should be
       attributed to when it's publicly presented
   
       \begin{description}
       \item[name] a name (free text)
   
       \item[url] a URL (with an optional \texttt{label} attribute to show
         as text)
   
       \item[description] more information (free text, e.g. holding
         library call number)
       \end{description}
   
     \item[copyright] the copyright holder and it's conditions
       \begin{description}
       \item[owner] the name of the copyright holder
         \begin{description}
         \item[name] a name (free text)
   
         \item[url] a URL (with an optional \texttt{label} attribute to show
           as text)
         \end{description}
   
       \item[date] the date when the copyright was issued
   
       \item[duration] the duration of the copyright term (if known)
   
       \item[description] free-text field for special or additional
         conditions
       \end{description}
   
   
     \item[publish-metadata] metadata about this resource can be made
       freely available when this tag is present (otherwise metadata has
       the same access conditions as the rest of the resource). Access to
       the resource itself is regulated separately by the \texttt{access}
       element.
   
     \item[access] conditions of access to this resource. Different
       access types are specified by a \texttt{type} attribute:
       \begin{description}
       \item[type=group] access restricted to the members of this named
         group. The method to identify a user belonging to a named group
         is not specified in this document.
         \begin{description}
         \item[name] name of the group.
   
         \item[only-before] the access condition is only valid before the
           given date (format: ``YYYY/MM/DD'').
   
         \item[only-after] the access condition is only valid after the
           given date (format: ``YYYY/MM/DD'').
         \end{description}
       
       \item[type=institution] access restricted to the members of this
         institution. The method to identify a user to belong to the
         institution is not specified in this document.
         \begin{description}
         \item[name] name of the group.
   
         \item[only-before] the access condition is only valid before the
           given date (format: ``YYYY/MM/DD'').
   
         \item[only-after] the access condition is only valid after the
           given date (format: ``YYYY/MM/DD'').
         \end{description}
       
   
       \item[type=subnet] access restricted to all computers with an
         IP-address in this subnet.
         \begin{description}
         \item[range] subnet range defined in
         truncated-quad (e.g. ``141.14''), network-netmask
         (e.g. ``141.14.0.0/255.255.0.0''), or network-range
         (e.g. ``141.14.0.0/16'') notation.
   
         \item[only-before] the access condition is only valid before the
           given date (format: ``YYYY/MM/DD'').
   
         \item[only-after] the access condition is only valid after the
           given date (format: ``YYYY/MM/DD'').
         \end{description}
       
           
       \item[type=scientific] access to this resource should be restricted to
         scientific work
         \begin{description}
         \item[only-before] the access condition is only valid before the
           given date (format: ``YYYY/MM/DD'').
   
         \item[only-after] the access condition is only valid after the
           given date (format: ``YYYY/MM/DD'').
         \end{description}
       
   
       \item[type=free] access to this resource is not restricted
         \begin{description}
         \item[only-before] the access condition is only valid before the
           given date (format: ``YYYY/MM/DD'').
   
         \item[only-after] the access condition is only valid after the
           given date (format: ``YYYY/MM/DD'').
         \end{description}
       
         
       \item[type=special] if none of the above conditions seems appropriate,
         a free-form text can be specified here.
         \begin{description}
         \item[description] description of special access conditions.
   
         \item[only-before] the access condition is only valid before the
           given date (format: ``YYYY/MM/DD'').
   
         \item[only-after] the access condition is only valid after the
           given date (format: ``YYYY/MM/DD'').
         \end{description}
       
       \end{description}
     \end{description}
   \end{description}
   
   \noindent
   It should be noted that control over access to the resource has to be
   provided by additional technical measures. Access conditions in the
   metadata file only state that conditions \emph{should} be observed, it
   is not implied that they \emph{are} necessarily observed, as the
   enforcement of conditions depends on additional measures.
   
   
   
   \subsection{Acquisition of raw-data}
   \label{sec:acqu-inform}
   
   Information about the acquisition source for raw data resources can be
   provided in an \texttt{acquisition} container.
   
     \begin{description}      \begin{description}
     \item[container-tag] the name of the text root element (default  \item[acquisition] the acquisition source of this resource -- required
       ``text'')    for raw data.
     \begin{description}
     \item[provider] where this resource came from -- required
       \begin{description}
       \item[name] free-text name of the provider (institution or
         individual)
   
       \item[address] address of the provider
               
     \item[ref-element-tag] the name of the element that is used as      \item[contact] contact person at the provider (i.e. name and email)
       unit of reference when results are presented  
           
     \item[pagebreak-tag] the name of the element that indicates page      \item[url] URL related to the provider
       breaks (default ``pb'')  
       \item[provider-id] id of the provider (internally used) -- deduced
       \end{description}
   
     \item[date] date of acquisition -- required
   
     \item[description] free-text description of the acquisition source or
     additional information
     \end{description}      \end{description}
   \end{description}    \end{description}
   
   
   
   \subsection{Documentary Films}
   \label{sec:documentary-films}
   
   Documentary films can be described using a \texttt{film-acquisition}
   container.
   
   \begin{description}
   \item[film-acquisition] description of a (documentary) film --
     required for documentary film
     \begin{description}
     \item[recording] specification of the recording process
       \begin{description}
       \item[author] the person or persons doing the recording
   
       \item[date] the date or time span when the film was recorded
   
       \item[location] the place where the film was recorded
   
       \item[device] recording device used (e.g. ``Sony CP-DV8 Camcorder'')
         
       \item[format] format of the recorded film -- required (e.g. ``DV
         720x524 25fps interlaced'')
 \end{description}  \end{description}
   
     \item[description] free-form description of the recording and the
       content of the film
     \end{description}
   \end{description}
   
   (More information about the digitization step could be added in a
   \texttt{digitization} tag similar to the \texttt{recording} tag.)
   
 \subsection{Access restrictions}  
 \label{sec:access-restrictions}  
   
 If the access to a resource is restricted for technical or legal  
 reasons then the restrictions can be put in a  
 \texttt{access-restrictions} container. The format of the information  
 inside the container has to be further specified.  
   
   
 \section{Sample metadata files for ECHO resources}  \section{Sample metadata files for ECHO resources}
Removed from v.1.11  
changed lines
  Added in v.1.21

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