Data Model

This page describes how we model data from each form from the MPP project. Each form will be treated in a subsection. Loci forms will be treated together.

Loci Forms

Several pieces of each loci form are identical across the three types.

1. Earth Loci (Color: yellow - most common)

2. Architectural Loci (Color: pink)

3. Installation Loci (Color: purple)

Burials (Color: Brown) are not strictly a loci since they do not get a locus number, but are attached to an earth locus. THEREFORE, burial forms are child entities of an earth locus.

Earth Locus

\noindent
\begin{tabular}{|l|l|l|l|p{3in}|}
  \hline
  \textbf{Section} & \textbf{Element Identifier} & \textbf{Element Type} & \textbf{Default}     & \textbf{Description} \\ \hline
  0.None  &                    &               &             &             \\ \hline
          & Cleanup            & Boolean       & False       & Check only if debris is interseasonal erosion and if there are pottery, bones, and other objects that need listing \\ \hline
          & Balk Removal       & Boolean       & False       & Check only if you excavated a locus during the balk removal and you don't have the original locus sheet \\ \hline
  1.Identification & & & & \\ \hline             
          & A.Locus            & Integer       & None        & IF there exists true in section 0. This is a Cleanup or Removal Excavation NOTE DEV. from Manual due to database constraints. \\ \hline
          & B.Site             & Char          & None        & Single Char identifier of site \\ \hline
          & C.Season           & Integer       & Year(today) & Convention is last two digits of year --> Bah make it four digits \\ \hline
          & D.Field            & Char          & None        & Single letter field designation \\ \hline
          & E.Square           & varchar(8)    & None        & Sample: "6L46" or "A6" seems random.\\ \hline
          & F.StartDate        & Date          & Today()     & Sample: 18 Jul 2009 [dd/mm/yyyy] \\ \hline & F.EndDate          & Date         & NULL        & same. \\ \hline
          & G.Sheet            & Integer       & NULL        & \textbf{NOT USED!} When we print out sheets they will have page numbers \\ \hline
          & H.Supervisor       & varchar(25)[] & NOT NULL    & If you worked on this sheet add your name to the list! \\ \hline
          & I.BALK             & char(1)       & NULL        & Used for balk removal (seldom used) \\ \hline
          & J.Designation      & varchar(80)   & NULL        & Free form description of the layer \\ \hline
  2.Rational & & & & \\ \hline
          & A.Reason           & varchar(80)   & NULL        & Free form reason for change (Color change,...) \\ \hline
          & B.Separability.Top & selection     & Average     & Selection from \textbf{Separability Entity:Very Clear, Clear, Average, Unclear, Very Unclear, Arbitrary } \\ \hline
          & B.Separability.Bot & selection     & Average     & Bottom of locus is from Separability Entity \\ \hline
  3.Description & & & & \emph{Description is significantly different across loci forms } \\ \hline
  4.Stratigraphy & N/A & Child Element & NULL & Model: Association Table Stratigraphy(This, Loci, Spatial Relationship:\emph{above, below, equal, contiguous to, seals against, but by, cuts, FT, Abuts, Abutted by, sealed against by, bonded to}) \\ \hline 
  5.Levels & & & & Spatial Object Query - We now collect all spatial information with the Total Station. Therefore this section now is just a reference to the coordinates take at different times. Use intersection Table with point sets\\ \hline
  6.Identification & & & & Printed header on subsequent pages - not recorded! \\ \hline
  7.Pottery & & & & List of pottery bucket numbers. Model data as an intersection table. \textbf{Requires Entity: Pottery\_Bucket(see figure on p.26)} \\ \hline
  8.Bones & & & & List of bone bucket numbers and associated Pottery Bucket numbers. \textbf{Requires Entity: Bones(Pail\#, Date, Location, Comments)}\\ \hline
  9.Seeds & & & & Identical to Bones model - \textbf{Requires Entity: Seeds(Pail\#, Date, Sample\#, Location,Reading)} \\ \hline
  10.Objects & & & & Similar to Seeds model - \textbf{Requires Entity: Object(Pail\#, Date, Field\#, Spatial Coordinates Set\#, Reading) : Associated with pictures,loci...} \\ \hline
  11.Photographs & & & & List of photo numbers model - intersection table. \\ \hline
  12.Biodata Samples & BioDataSamples & varchar(80) & Pollen & PROGRAMMING: list elements to check, allow additional information to be typed. The combination goes here. \\ \hline
  13.Drawings & & Intersection Table & NULL & \textbf{Requires Entity: Drawing(ID, Image, ...)} \\ \hline
  14.Interpretation & & & & \\ \hline
          & A.Fucntion        & varchar(500)   & NULL        &  What was this loci used for in antiquity \\ \hline
          & B.Stratigraphy    & varchar(500)   & NULL        & This is a textual check on the data that we collect with the total station \\ \hline
          & C.CleanLocus      & boolean        & false       & Did this layer produce pottery from one period only with no mixing of ceramic horizons? Yes--> true \\ \hline
          & D.Locus Date      & varchar(50)    & NULL        & Excavators dating of the layer \\ \hline
          & E.Phase           & varchar(10)    & NULL        & Completed later ... \\ \hline
          & F.Stratum         & varchar(10)    & NULL        & Completed later ... \\ \hline
\end{tabular}