--- storage/meta/meta-format.tex	2003/09/01 11:00:08	1.9
+++ storage/meta/meta-format.tex	2010/11/23 11:53:28	1.25
@@ -16,7 +16,7 @@
 
 \author{Robert Casties, Dirk Wintergrün, Hans-Christoph Liess}
 
-\date{V1.0.2a of 20.8.2003}
+\date{V1.3.8 of 30.8.2010}
 
 \begin{document}
 
@@ -32,8 +32,22 @@ File and directory names should not cont
 in filenames are only the alphanumeric set a-z, A-Z, 0-9, hyphen
 ``-'', underscore ``\_'' and dot ``.''.
 
-File and directory paths in the metadata file use the conventional
-Unix file separator slash ``/''.
+Files and directories with names that contain illegal characters must
+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}
@@ -45,20 +59,20 @@ files are possible:
 \begin{itemize}
 \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
-  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}
 
 The resource directory must contain an \texttt{index.meta} file with
-information about the resource as a whole. Other directories can
-contain \texttt{index.meta} files.
+information about the resource as a whole. Subdirectories can
+contain additional \texttt{index.meta} files.
 
 Additional information about single data files that are part of the
 resource can either be put in \texttt{file} tags in the
 \texttt{index.meta} file or in separate \emph{filename}\texttt{.meta}
 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}
@@ -72,13 +86,28 @@ supplied by the provider of the resource
 automatic scripts later in the process, these elements must be present
 in the final file.
 
-The outer container element is \texttt{resource}. Sub-types (``ECHO'',
-``MPIWG'') can be specified if necessary with a \texttt{type}
-parameter. Its sub-elements are:
+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
+\textbf{attributes}:
 
 \begin{description}
-\item[description] An informal textual description of the
-  resource -- optional.
+\item[type] sub-type of resource (e.g. ``ECHO'', ``MPIWG'') --
+  optional.
+  
+\item[version] version number of metadata format (currently 1.2) --
+  required.
+\end{description}
+
+\noindent The allowed \textbf{elements} inside \texttt{resource} are:
+
+\begin{description}
+\item[description] An informal textual description of the resource --
+  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
   file is contained in) -- required.
@@ -94,14 +123,35 @@ parameter. Its sub-elements are:
 
 \item[archive-path] The full path to the resource directory inside the
   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
   resource if this resource is a modified version of another resource
   -- optional.
 
   \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
-    --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
   of this resource to the original resource -- optional.
@@ -112,21 +162,45 @@ parameter. Its sub-elements are:
   -- optional.
 
   \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
-    --required.
+    -- required (or archive-id).
 
   \item[description] An informal textual description of the relation
   of this resource to the linked resource -- optional.
   \end{description}
   
-\item[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.}
+\item[is-part-of] Container for the description of another resource if this 
+  resource is a part of the other resource.  -- optional. It can have a 
+  \texttt{type} attribute describing the type of relation .e.g. ``manuscript-codex''.
+
+  \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
+    -- required (or archive-id).
+
+  \item[description] An informal textual description of the relation
+  of this resource to the original resource -- optional.
+  \end{description}
+  
+\item[media-type] \label{tag-media-type} The main media type of this
+  resource -- required.\\ The main media type can be overridden by
+  \texttt{media-type}s in subdirectories. Possible types are
+  \begin{itemize}
+  \item \texttt{image}
+
+  \item \texttt{text}
+
+  \item \texttt{audio}
+
+  \item \texttt{video}
+
+  \item \texttt{data} for other type of data
+  \end{itemize}
   
 \item[meta] Additional metadata information about the resource --
   optional.\\ For a description of additional metadata see below.
@@ -142,6 +216,12 @@ parameter. Its sub-elements are:
 
   \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
     resource's root directory (excluding the directory itself) --
     required (may be empty or omitted if the directory is a direct
@@ -161,6 +241,12 @@ parameter. Its sub-elements are:
 
   \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
     resource's root directory (excluding the file itself) -- required
     (may be empty or omitted if the file is in the resource's root
@@ -192,7 +278,48 @@ parameter. Its sub-elements are:
 \label{sec:additional-metadata}
 
 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}
 \label{sec:lang}
@@ -220,17 +347,49 @@ on the page
 \subsection{Collection context}
 \label{sec:collection-context}
 
-The context of a resource as part of a collection or part of a project can be
-specified in the \texttt{context} element. All elements in the
-container can appear multiple times.
+The context of a resource as part of a collection or part of a project
+can be specified in the \texttt{context} element. The context element
+can appear multiple times if the resource is part of multiple
+collections or projects.
 
 \begin{description}
 \item[context] information on collection or project context.
 
   \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.
+  \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[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}
 
@@ -273,6 +432,8 @@ the commonly used program ``EndNote''.
     published in multiple volumes.
   \item [translator] Name of the translator.
   \item [isbn-issn]
+  \item[call-number] Call number in holding library
+  \item[holding-library] Holding library
   \end{description}
 \end{description}
 
@@ -301,6 +462,8 @@ the commonly used program ``EndNote''.
     published in multiple volumes.
   \item [translator] Name of the translator
   \item [isbn-issn]
+  \item[call-number] Call number in holding library
+  \item[holding-library] Holding library
   \end{description}
 \end{description}
 
@@ -329,6 +492,8 @@ the commonly used program ``EndNote''.
   \item [number-of-volumes] Number of volumes, if the the book is
     published as multiple volumes.
   \item [isbn-issn]
+  \item[call-number] Call number in holding library
+  \item[holding-library] Holding library
   \end{description}
 \end{description}
 
@@ -354,6 +519,26 @@ the commonly used program ``EndNote''.
   \item [number-of-volumes] Number of volumes, if the the book is
     published as multiple volumes.
   \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}
 
@@ -371,6 +556,8 @@ the commonly used program ``EndNote''.
   \item [pages] Number of pages of the article.
   \item [alternate-journal] Alternate Journal
   \item [isbn-issn]
+  \item[call-number] Call number in holding library
+  \item[holding-library] Holding library
   \end{description}
 \end{description}
 
@@ -387,6 +574,8 @@ the commonly used program ``EndNote''.
   \item [issue-number] Number of the issue the article is part of.
   \item [pages Number] of pages of the article.
   \item [date] Date when the article appeared.
+  \item[call-number] Call number in holding library
+  \item[holding-library] Holding library
   \end{description}
 \end{description}
 
@@ -402,6 +591,8 @@ the commonly used program ``EndNote''.
   \item [pages] Number of pages of the article.
   \item [issue-date] Date of the issue the article is part of.
   \item [city] City of the newspaper.
+  \item[call-number] Call number in holding library
+  \item[holding-library] Holding library
   \end{description}
 \end{description}
 
@@ -420,6 +611,8 @@ the commonly used program ``EndNote''.
   \item [University] Name of the university where the thesis was
     handed in.
   \item [isbn-issn]
+  \item[call-number] Call number in holding library
+  \item[holding-library] Holding library
   \end{description}
 \end{description}
 
@@ -437,6 +630,8 @@ the commonly used program ``EndNote''.
   \item [institution] Institution where the report was produced.
   \item [type] Type of report.
   \item [report-number] Report number.
+  \item[call-number] Call number in holding library
+  \item[holding-library] Holding library
   \end{description}
 \end{description}
 
@@ -458,6 +653,105 @@ the commonly used program ``EndNote''.
     annotations etc.
   \item [description] This can be any kind of description.
   \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{Extended Manuscript}
+
+\begin{description}
+\item [bib type="extended-manuscript"] a handwritten/typewritten manuscript
+with detailed information about the manuscripts appearance.
+
+  \begin{description}
+  \item [title] Title of the manuscript.
+  \item [author] The author of the text.
+   \item[holding-library] Holding library.
+   \item[call-number] Call number/Shelf mark in holding library.
+  \item[location] Place/City/Country where the manuscript is
+    currently located.
+  \item[date calendar="type"] The date of publication with attribute which
+  calendar used. If no attribute used, CE is the default. Can also be
+  descriptive.
+  \item[year calendar="type"] Approximate year or century .
+  \item[number-of-folios] Number of folios/pages of the manuscript.
+  \item[signature] Signature(s) of the manuscript, under which a manuscript is
+  known.
+  \item[abstract] Interpretative abstract of the text's content.
+  \item[incipit] Incipit (beginning of text).
+  \item[explicit] Explicit (end of text).
+  \item[contents] Formal description of the text structure (e.g. table of
+  contents).
+  \item[writing-surface] material of the writing surface (e.g. ``non-european
+  paper'', ``palm leaf'',\ldots)
+  \item[foliation] Text giving list or range of folios. 
+  \item[page-dimensions] height and width in cm.
+  \item[written-area-dimensions] height and width in cm.
+  \item[lines-per-page] number of lines and columns.
+  \item[catchwords] Quire signatures and catchwords.
+  \item[scripts] Description of the script and the ink used.
+  \item[copyist] Copyist.
+  \item[collation-corrections] Notes on collation and corrections.
+  \item[binding] Description of binding.
+  \item[notes-on-ownership] Notes on ownership.
+  \item[notes] Additional notes.
+  \item[secondary-literature] Notes on secondary literature related to the
+    manuscript
+  \item [editorial-remarks] Remarks related to the online
+    publication of the manuscript.
+  \item [keywords] Keywords related to the manuscript.
+  \end{description}
+\end{description}
+
+\subsubsection{Codex}
+
+\begin{description}
+\item [bib type="codex"] Codex i.e. bound collection of one or more manuscripts.
+
+  \begin{description}
+  \item[holding-library] Holding library.
+  \item[call-number] Call number/Shelf mark in holding library.
+  \item[location] Place/City/Country where the codex is
+    currently located.
+  \item[date calendar="type"] Date of the collation of the codex.
+  \item[year calendar="type"] Approximate year or century .
+  \item[number-of-folios] Number of folios/pages of the manuscript.
+  \item[foliation] Text giving list or range of folios.
+  \item[signature] Signature(s) of the manuscript, under which a manuscript is
+  known.
+  \item[contents] Formal description of the text structure (e.g. table of
+  contents).
+  \item[dimensions] height + width in cm.
+  \item[binding] Description of binding.
+  \item[notes] Additional notes.
+  \item[notes-on-ownership] Notes on ownership.
+ \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}
 
@@ -523,7 +817,7 @@ appear multiple times.
 \end{description}
 
 
-\subsection{Information on the document structure (table of contents)}
+\subsection{Document structure (table of contents)}
 \label{sec:toc}
 
 Information on the structure of a document like the division into
@@ -606,7 +900,7 @@ tags.
 %%\url{http://pythia.mpiwg-berlin.mpg.de/toolserver/TS_lise}
 
 
-\subsection{Information on scanned images}
+\subsection{Digital images}
 \label{sec:inform-scann-imag}
 
 Image files representing scanned images can have an \texttt{img}
@@ -620,16 +914,17 @@ Required is one of three possible sets o
 \item[img] digital image information.
 
   \begin{description}
-  \item[original-size-x] The width of the original image. The unit of
-    measure can be contained as parameter \texttt{unit}, the default
-    is meter ``m''. The width to be considered is the total width of
-    the scanned area.
+  \item[original-size-x] The width of the original
+    image -- required. \\
+    The unit of measure can be contained as parameter \texttt{unit},
+    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}
 
@@ -640,10 +935,14 @@ or
 
   \begin{description}
   \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
-    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}
 
@@ -654,56 +953,289 @@ or
 
   \begin{description}
   \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}
 
 
+
+\subsection{Digital image acquisition}
+\label{sec:inform-about-image}
+
+A description of the technology used in the process of producing a
+digital image.
+
+\begin{description}
+\item[image-acquisition] description of the image production process
+  \begin{description}
+  \item[device] acquisition device (e.g. ``flatbed scanner'') 
+
+  \item[image-type] type and color-depth of the image -- required (e.g. ``RGB 24
+    bit'')
+
+  \item[production-comment] additional textual information about the
+    production process
+  \end{description}
+\end{description}
+
+
+
 \subsection{Full text with images}
 \label{sec:full-text-with}
 
-Full text in a XML format will be specified with a
-\texttt{content-type} ``fulltext''.
+Full text in a XML format should be specified with a
+\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
 whole pages or parts of pages must be specified in a
-\texttt{text-tool} container.
+\texttt{texttool} container.
 
 \begin{description}
-\item[text-tool] representation of full text with images
-
+\item[texttool] representation of full text with images
+  
   \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 (path
     inside document directory)
+    
+  \item[text-url-path] a characteristic part of the URL with which the
+    full text can be retrieved (the form and content of this element
+    is dependent on the specific text retrieval mechanism)
+    
+  \item[image] the directory name of the directory containig the
+    page image files (path inside document directory)
 
-  \item[page-images] the directory name of the directory containig the
-    page image files (with path
-    inside document directory)
+  \item[figure] the directory name of the directory containig the
+    in-page figure image files (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
 
-  \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.
+
+% attribute for type 'original', 'digital-image', 'text'
+% tags can be repeated
+% CC license short-cut
+
+
+\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[container-tag] the name of the text root element (default ``text'')
+      \item[only-before] the access condition is only valid before the
+        given date (format: ``YYYY/MM/DD'').
 
-  \item[ref-element-tag] the name of the element that is used as unit of
-    reference when results are presented
+      \item[only-after] the access condition is only valid after the
+        given date (format: ``YYYY/MM/DD'').
+      \end{description}
     
-  \item[pagebreak-tag] the name of the element that indicates page
-    breaks (default ``pb'')
+        
+    \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}
+\item[acquisition] the acquisition source of this resource -- required
+  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[contact] contact person at the provider (i.e. name and email)
+
+    \item[url] URL related to the provider
+
+    \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}
 
 
 
-\subsection{Access restrictions}
-\label{sec:access-restrictions}
+\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}
+ 
+  \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.)
+
 
-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}
@@ -713,7 +1245,7 @@ scanned document.
 
 \begin{small}
 \begin{verbatim}
-<resource type="ECHO">
+<resource type="ECHO" version="1.0">
   <description>Fleck, 1980</description>
   <name>fleck.1980</name>
   <creator>University of Bern</creator>
@@ -754,7 +1286,7 @@ architectural drawing.
 
 \begin{small}
 \begin{verbatim}
-<resource type="ECHO">
+<resource type="ECHO" version="1.0">
   <creator>Bibliotheca Hertziana</creator>
   <content-type>scanned images</content-type>
   <file>